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Pathology – Pancreatic Endocrine Tumors
Pancreatic endocrine tumors are epithelial tumors of the pancreas that exhibit endocrine differentiation. Tumors can be active or inactive based on the presence of an abnormal hormone secretion syndrome.
Epidemiology: Rare tumors account for around 2% of all pancreatic tumors. • Peak incidence occurs between 30 and 60 years
• Unknown in infrequent occurrences. • Approximately 15% are linked to multiple endocrine neoplasia (MEN)-1. • Early genetic events include losses at chromosomes 1 and 11q and gains at 9q. • Increased changes can lead to malignant behaviors. Tumors that produce excess hormones may exhibit symptoms such as hypoglycemia (insulin-producing tumors), recurrent duodenal ulcers (gastrin-producing tumors), and necrolytic migratory erythema (glucagon-producing tumors). • Non-functioning tumors are detected by imaging or when they become large enough to cause symptoms or metastases. Macroscopy reveals well-defined tumors in the pancreas.
Cytopathology: • Fine needle aspiration (FNA) smears are cellular, with a monotonous population of cells present singly, in loose clusters, or in pseudorosettes. • The nuclei typically exhibit a distinct granular chromatin pattern ('salt-and-pepper').
Histopathology: • Tumor cells have granular cytoplasm and form solid nests, trabeculae, glands, or rosettes. • Immunostaining confirms the endocrine origin of the cells through reactivity for markers CD56, chromogranin, and synaptophysin.
Prognosis: • Often difficult to anticipate with confidence.
Long-term follow-up is necessary for all potentially malignant tumors, as metastases can form years after the main lesion is removed.
Clinicopathological classification of pancreatic endocrine tumors.
Well-differentiated endocrine tumor. Benign pancreatic tumors are non-angioinvasive, <2cm in size, with ≤ 2 mitoses />0hpf and ≤ 2% Ki-67 positive cells. Uncertain behavior is associated with the pancreas and one or more of the following features: ≥ 2cm size, 2-10 mitoses/10hpf, > 2% Ki-67 positive cells/10hpf, angioinvasion, or perineural invasion.
Well-differentiated endocrine carcinoma. Histologically low-grade, but with significant local invasion and/or metastasis.
poorly differentiated endocrine carcinoma. Histologically high-grade, having more than 10 mitoses/10 hpf
Pancreatic endocrine tumors are epithelial tumors of the pancreas that exhibit endocrine differentiation. Tumors can be active or inactive based on the presence of an abnormal hormone secretion syndrome.
Epidemiology: Rare tumors account for around 2% of all pancreatic tumors. • Peak incidence occurs between 30 and 60 years
• Unknown in infrequent occurrences. • Approximately 15% are linked to multiple endocrine neoplasia (MEN)-1. • Early genetic events include losses at chromosomes 1 and 11q and gains at 9q. • Increased changes can lead to malignant behaviors. Tumors that produce excess hormones may exhibit symptoms such as hypoglycemia (insulin-producing tumors), recurrent duodenal ulcers (gastrin-producing tumors), and necrolytic migratory erythema (glucagon-producing tumors). • Non-functioning tumors are detected by imaging or when they become large enough to cause symptoms or metastases. Macroscopy reveals well-defined tumors in the pancreas.
Cytopathology: • Fine needle aspiration (FNA) smears are cellular, with a monotonous population of cells present singly, in loose clusters, or in pseudorosettes. • The nuclei typically exhibit a distinct granular chromatin pattern ('salt-and-pepper').
Histopathology: • Tumor cells have granular cytoplasm and form solid nests, trabeculae, glands, or rosettes. • Immunostaining confirms the endocrine origin of the cells through reactivity for markers CD56, chromogranin, and synaptophysin.
Prognosis: • Often difficult to anticipate with confidence.
Long-term follow-up is necessary for all potentially malignant tumors, as metastases can form years after the main lesion is removed.
Clinicopathological classification of pancreatic endocrine tumors.
Well-differentiated endocrine tumor. Benign pancreatic tumors are non-angioinvasive, <2cm in size, with ≤ 2 mitoses />0hpf and ≤ 2% Ki-67 positive cells. Uncertain behavior is associated with the pancreas and one or more of the following features: ≥ 2cm size, 2-10 mitoses/10hpf, > 2% Ki-67 positive cells/10hpf, angioinvasion, or perineural invasion.
Well-differentiated endocrine carcinoma. Histologically low-grade, but with significant local invasion and/or metastasis.
poorly differentiated endocrine carcinoma. Histologically high-grade, having more than 10 mitoses/10 hpf
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Pathology - Pancreatic cystic tumors
Intraductal papillary mucinous neoplasm is a visible, mucin-producing tumor that develops within the pancreatic duct system.
• In men, the majority develop in the head of the pancreas. • Mucin-filled cysts communicate with the pancreatic duct system.
• Mucin-secreting columnar epithelial cells line the cysts, forming papillary projections. Epithelial cells can exhibit varying degrees of atypia. This lesion can give birth to invasive cancer.
Mucinous cystic neoplasms. • A variety of lesions, the majority of which are benign. • Symptoms of an abdominal mass are common among women. • Cystic tumors are well-defined and feature massive mucoid locules. The cysts don't communicate with the pancreatic ductal system. • The cysts are bordered by mucus-secreting columnar epithelial cells and have a dense, ovarian-like stroma beneath. The epithelial component can exhibit mild to severe atypia. Invasive carcinomas can develop within these lesions.
Serous cystic neoplasms. • Most benign lesions are found in women and cause abdominal mass symptoms. • The most frequent kind is serous microcystic adenoma, which causes a well-defined pancreatic mass with multiple tiny cysts and a central scar. The small cysts are bordered by cuboidal cells with a spherical nucleus and transparent cytoplasm, indicating glycogen buildup.
Small pseudopapillary neoplasm. • Pancreatic neoplasm with cystic change. • Commonly found in young women with abdominal mass symptoms. Tumors in the pancreas can form a solid mass with cysts and hemorrhage.
Histologically, the tumor is made up of homogeneous spherical cells that form sheets and cables. Pseudopapillary and cystic areas are caused by poorly cohesive cells. Tumors are typically low-grade, with most patients staying tumor-free for years after resection.
Intraductal papillary mucinous neoplasm is a visible, mucin-producing tumor that develops within the pancreatic duct system.
• In men, the majority develop in the head of the pancreas. • Mucin-filled cysts communicate with the pancreatic duct system.
• Mucin-secreting columnar epithelial cells line the cysts, forming papillary projections. Epithelial cells can exhibit varying degrees of atypia. This lesion can give birth to invasive cancer.
Mucinous cystic neoplasms. • A variety of lesions, the majority of which are benign. • Symptoms of an abdominal mass are common among women. • Cystic tumors are well-defined and feature massive mucoid locules. The cysts don't communicate with the pancreatic ductal system. • The cysts are bordered by mucus-secreting columnar epithelial cells and have a dense, ovarian-like stroma beneath. The epithelial component can exhibit mild to severe atypia. Invasive carcinomas can develop within these lesions.
Serous cystic neoplasms. • Most benign lesions are found in women and cause abdominal mass symptoms. • The most frequent kind is serous microcystic adenoma, which causes a well-defined pancreatic mass with multiple tiny cysts and a central scar. The small cysts are bordered by cuboidal cells with a spherical nucleus and transparent cytoplasm, indicating glycogen buildup.
Small pseudopapillary neoplasm. • Pancreatic neoplasm with cystic change. • Commonly found in young women with abdominal mass symptoms. Tumors in the pancreas can form a solid mass with cysts and hemorrhage.
Histologically, the tumor is made up of homogeneous spherical cells that form sheets and cables. Pseudopapillary and cystic areas are caused by poorly cohesive cells. Tumors are typically low-grade, with most patients staying tumor-free for years after resection.
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Pathology - Cirrhosis
Definition • Irreversible substitution of normal liver structure with fibrous tissue bands that segregate nodules of regenerating hepatocytes.
Epidemiology • Prevalent and rising in frequency attributable to alcohol consumption and obesity.
Aetiology
Alcohol, chronic viral hepatitis, and non-alcoholic fatty liver disease (NAFLD) are the predominant etiological factors. • Less frequently, primary biliary cholangitis (PBC), primary sclerosing cholangitis (PSC), autoimmune hepatitis (AIH), Wilson's disease, and hemochromatosis. • In certain instances, the etiology remains ambiguous (cryptogenic cirrhosis).
Pathogenesis
Persistent liver damage prompts Kupffer cells within the vascular sinusoids to secrete cytokines that activate hepatic stellate (Ito) cells. Activated stellate cells undergo proliferation and release substantial amounts of thick collagen, resulting in permanent liver fibrosis and hepatocyte depletion. Cirrhosis induces several functional impairments: diminished synthesis of coagulation factors; decreased glycogen reserves; impaired clearance of pathogens by Kupffer cells; portal hypertension accompanied by hypersplenism and esophageal varices; splanchnic vasodilation; reduced renal blood flow; secondary hyperaldosteronism; and ascites.
Presentation • Atypical symptoms of fatigue and general discomfort. Clinical examination typically reveals signs of chronic liver disease, and liver function tests are generally abnormal. Patients frequently exhibit complications associated with cirrhosis, such as upper gastrointestinal hemorrhage.
Macroscopy • The liver may present as normal in size, hypertrophied, or atrophied. • The sliced surface exhibits a firm texture and displays diffuse nodularity.
Histopathology • The liver is entirely substituted by nodules of regenerating hepatocytes encircled by fibrous bands. • The fibrous bands exhibit a heterogeneous inflammatory infiltrate and reactive bile ductular proliferation. • In certain instances, the characteristics may indicate a specific cause.
Prognosis • Generally unfavorable, with a substantial risk of considerable complications including infections (notably bacterial peritonitis), upper gastrointestinal hemorrhage, renal failure, and hepatocellular cancer.The emergence of comorbidities may lead the patient to terminal liver failure, marked by profound jaundice, significant coagulopathy, hepatic encephalopathy, and an elevated risk of mortality.
Definition • Irreversible substitution of normal liver structure with fibrous tissue bands that segregate nodules of regenerating hepatocytes.
Epidemiology • Prevalent and rising in frequency attributable to alcohol consumption and obesity.
Aetiology
Alcohol, chronic viral hepatitis, and non-alcoholic fatty liver disease (NAFLD) are the predominant etiological factors. • Less frequently, primary biliary cholangitis (PBC), primary sclerosing cholangitis (PSC), autoimmune hepatitis (AIH), Wilson's disease, and hemochromatosis. • In certain instances, the etiology remains ambiguous (cryptogenic cirrhosis).
Pathogenesis
Persistent liver damage prompts Kupffer cells within the vascular sinusoids to secrete cytokines that activate hepatic stellate (Ito) cells. Activated stellate cells undergo proliferation and release substantial amounts of thick collagen, resulting in permanent liver fibrosis and hepatocyte depletion. Cirrhosis induces several functional impairments: diminished synthesis of coagulation factors; decreased glycogen reserves; impaired clearance of pathogens by Kupffer cells; portal hypertension accompanied by hypersplenism and esophageal varices; splanchnic vasodilation; reduced renal blood flow; secondary hyperaldosteronism; and ascites.
Presentation • Atypical symptoms of fatigue and general discomfort. Clinical examination typically reveals signs of chronic liver disease, and liver function tests are generally abnormal. Patients frequently exhibit complications associated with cirrhosis, such as upper gastrointestinal hemorrhage.
Macroscopy • The liver may present as normal in size, hypertrophied, or atrophied. • The sliced surface exhibits a firm texture and displays diffuse nodularity.
Histopathology • The liver is entirely substituted by nodules of regenerating hepatocytes encircled by fibrous bands. • The fibrous bands exhibit a heterogeneous inflammatory infiltrate and reactive bile ductular proliferation. • In certain instances, the characteristics may indicate a specific cause.
Prognosis • Generally unfavorable, with a substantial risk of considerable complications including infections (notably bacterial peritonitis), upper gastrointestinal hemorrhage, renal failure, and hepatocellular cancer.The emergence of comorbidities may lead the patient to terminal liver failure, marked by profound jaundice, significant coagulopathy, hepatic encephalopathy, and an elevated risk of mortality.
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Pathology – Cholecystitis
Cholecystitis is defined as gallbladder inflammation.
Epidemiology: • Very prevalent. Aetiology • The most common cause is gallstones (calculous cholecystitis). • Acalculous cholecystitis is also seen, particularly in the elderly.
Pathogenesis • Chemical harm to the mucosa by bile is thought to be the cause of biliary stasis. • A gallstone or inadequate gallbladder motility might block the gallbladder exit. Biliary colic causes acute upper abdomen pain that disappears spontaneously after several hours. • Acute cholecystitis is a serious condition characterized by persistent upper abdominal pain, fever, and tachycardia. Macroscopy reveals thicker gallbladder walls and potentially friable mucosa. • Gallstones are often present.
Histopathology • Acute cholecystitis is characterized by oedema, inflammatory cells, and granulation tissue. • Chronic cholecystitis is characterized by muscular hypertrophy and fibrous tissue, mild chronic inflammation, and the development of mucosal diverticula that herniate through the muscular layer (Rokitansky-Aschoff sinuses). • Xanthogranulomatous cholecystitis is a type of chronic cholecystitis characterized by the presence of macrophages and fibroblasts, likely due to a ruptured Rokitansky-Aschoff sinus.
Prognosis: Most individuals with calculous cholecystitis can be treated with cholecystectomy.
Cholecystitis is defined as gallbladder inflammation.
Epidemiology: • Very prevalent. Aetiology • The most common cause is gallstones (calculous cholecystitis). • Acalculous cholecystitis is also seen, particularly in the elderly.
Pathogenesis • Chemical harm to the mucosa by bile is thought to be the cause of biliary stasis. • A gallstone or inadequate gallbladder motility might block the gallbladder exit. Biliary colic causes acute upper abdomen pain that disappears spontaneously after several hours. • Acute cholecystitis is a serious condition characterized by persistent upper abdominal pain, fever, and tachycardia. Macroscopy reveals thicker gallbladder walls and potentially friable mucosa. • Gallstones are often present.
Histopathology • Acute cholecystitis is characterized by oedema, inflammatory cells, and granulation tissue. • Chronic cholecystitis is characterized by muscular hypertrophy and fibrous tissue, mild chronic inflammation, and the development of mucosal diverticula that herniate through the muscular layer (Rokitansky-Aschoff sinuses). • Xanthogranulomatous cholecystitis is a type of chronic cholecystitis characterized by the presence of macrophages and fibroblasts, likely due to a ruptured Rokitansky-Aschoff sinus.
Prognosis: Most individuals with calculous cholecystitis can be treated with cholecystectomy.
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Pathology - Intrahepatic cholangiocarcinoma
A malignant epithelial neoplasm originating in the liver, consisting of cells that resemble bile ducts.
Epidemiology • Uncommon in the majority of populations.
Aetiology Liver flukes (Clonorchis sinensis and Opisthorchis viverrini). • Hepatolithiasis. • PSC • Exposure to Thorotrast, a contrast agent utilized from 1930 until 1955. • Biliary anomalies.
Carcinogenesis • The most prevalent genetic abnormalities are mutations in RAS and TP53.
Presentation • Many manifest late, as they can attain significant size within the liver prior to eliciting symptoms such as malaise, weight loss, and abdominal pain. Tumors infiltrating the hilar area of the liver may manifest as obstructive jaundice.
Macroscopy • The liver has extensive confluent nodules of gray-white tumor, frequently accompanied by satellite deposits. • The surrounding liver tissue is typically non-cirrhotic. Histopathology: Adenocarcinomas characterized by infiltrating malignant epithelial cells that develop glandular and papillary forms. • A characteristic feature is the presence of profuse fibroblastic stroma.
Prognosis: Generally unfavorable, with 5-year survival rates ranging from 40% to 50%, contingent upon the stage.
Pathology - Intrahepatic cholangiocarcinoma
A malignant epithelial neoplasm originating in the liver, consisting of cells that resemble bile ducts.
Epidemiology • Uncommon in the majority of populations.
Aetiology Liver flukes (Clonorchis sinensis and Opisthorchis viverrini). • Hepatolithiasis. • PSC • Exposure to Thorotrast, a contrast agent utilized from 1930 until 1955. • Biliary anomalies.
Carcinogenesis • The most prevalent genetic abnormalities are mutations in RAS and TP53.
Presentation • Many manifest late, as they can attain significant size within the liver prior to eliciting symptoms such as malaise, weight loss, and abdominal pain. Tumors infiltrating the hilar area of the liver may manifest as obstructive jaundice.
Macroscopy • The liver has extensive confluent nodules of gray-white tumor, frequently accompanied by satellite deposits. • The surrounding liver tissue is typically non-cirrhotic. Histopathology: Adenocarcinomas characterized by infiltrating malignant epithelial cells that develop glandular and papillary forms. • A characteristic feature is the presence of profuse fibroblastic stroma.
Prognosis: Generally unfavorable, with 5-year survival rates ranging from 40% to 50%, contingent upon the stage.
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Pathology - Hepatocellular carcinoma
Definition • A malignant epithelial tumor of the liver originating from hepatocytes.
Epidemiology • Ubiquitous globally, although exhibiting significant geographical diversity. • Incidence rates closely align with HBV infection rates, rendering hepatocellular carcinoma (HCC) especially prevalent in some regions of Africa and Asia.
Etiology
Hepatocellular carcinoma typically develops in the context of liver cirrhosis. Chronic hepatitis B and haemochromatosis are notably carcinogenic substrates. Dietary consumption of aflatoxins produced by Aspergillus fungi is recognized as a strong carcinogen for the liver.
Carcinogenesis • The inactivation of tumor suppressor genes, such as TP53, is prevalent. • Activating mutations of oncogenes seem to be infrequent. The Hepatitis B X gene product impairs p53 functionality and obstructs nucleotide excision repair.
Presentation • Arrives late with nonspecific weight loss and abdominal discomfort. • Established cirrhotics may be identified through the evaluation of an increasing serum alpha-fetoprotein or with ultrasound monitoring.
Macroscopy: Expansile neoplastic tumor in the liver, frequently accompanied by satellite deposits. • The tumor may exhibit a green hue as a result of bile production. • Differentiating tumor deposits from cirrhotic nodules can be challenging.
Histopathology: Classical hepatocellular carcinoma (HCC) consists of epithelial cells akin to hepatocytes, generally proliferating in trabecular formations that resemble thicker hepatic cell plates. The tumor may exhibit bile production. Fibrolamellar HCC is a rare yet unusual form that often occurs in young people without preexisting cirrhosis. Histologically, the tumor consists of clusters of exceptionally large neoplastic cells with plentiful granular pink cytoplasm interspersed with dense fibrous bands.
Prognosis: Generally unfavorable, with 5-year survival rates below 5%. Fibrolamellar hepatocellular carcinoma exhibits a marginally improved prognosis, with 5-year survival rates of 60%.
Definition • A malignant epithelial tumor of the liver originating from hepatocytes.
Epidemiology • Ubiquitous globally, although exhibiting significant geographical diversity. • Incidence rates closely align with HBV infection rates, rendering hepatocellular carcinoma (HCC) especially prevalent in some regions of Africa and Asia.
Etiology
Hepatocellular carcinoma typically develops in the context of liver cirrhosis. Chronic hepatitis B and haemochromatosis are notably carcinogenic substrates. Dietary consumption of aflatoxins produced by Aspergillus fungi is recognized as a strong carcinogen for the liver.
Carcinogenesis • The inactivation of tumor suppressor genes, such as TP53, is prevalent. • Activating mutations of oncogenes seem to be infrequent. The Hepatitis B X gene product impairs p53 functionality and obstructs nucleotide excision repair.
Presentation • Arrives late with nonspecific weight loss and abdominal discomfort. • Established cirrhotics may be identified through the evaluation of an increasing serum alpha-fetoprotein or with ultrasound monitoring.
Macroscopy: Expansile neoplastic tumor in the liver, frequently accompanied by satellite deposits. • The tumor may exhibit a green hue as a result of bile production. • Differentiating tumor deposits from cirrhotic nodules can be challenging.
Histopathology: Classical hepatocellular carcinoma (HCC) consists of epithelial cells akin to hepatocytes, generally proliferating in trabecular formations that resemble thicker hepatic cell plates. The tumor may exhibit bile production. Fibrolamellar HCC is a rare yet unusual form that often occurs in young people without preexisting cirrhosis. Histologically, the tumor consists of clusters of exceptionally large neoplastic cells with plentiful granular pink cytoplasm interspersed with dense fibrous bands.
Prognosis: Generally unfavorable, with 5-year survival rates below 5%. Fibrolamellar hepatocellular carcinoma exhibits a marginally improved prognosis, with 5-year survival rates of 60%.
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Pathology - Benign hepatic lesions
Hemangioma • The most prevalent neoplasm of the liver. • Macroscopically, well-defined red neoplasms with a spongy texture because to the many vascular structures present inside them.
• Microscopically, it consists of many dilated blood arteries bordered by non-remarkable endothelial cells. • Benign lesions that are typically asymptomatic and necessitate no treatment.
Hepatic adenoma
• Uncommon neoplasm predominantly observed in young women of reproductive age. • Believed to be linked to the utilization of oral contraceptives.
• Macroscopically, single lesions frequently exceed 10 cm in size, exhibiting a softer consistency and a lighter hue compared to the surrounding liver tissue. • Hepatocytes are microscopically organized in plates that are 1 to 3 cells thick. Significant arteries are frequently observed within the lesion; however, portal tracts are lacking. Surgical excision is frequently conducted to avert the potentially lethal consequence of rupture and hemoperitoneum.
Focal nodular hyperplasia
• A benign non-neoplastic lesion typically observed in young women of reproductive age. • Believed to signify a limited region of liver hyperplasia resulting from alterations in blood flow linked to a pre-existing vascular abnormality.
A macroscopically distinct nodular region with a brighter hue than the surrounding liver tissue. Most lesions exhibit a distinctive center scar. •
Microscopic examination reveals nodules of hepatocytes interspersed with fibrous stroma harboring bile ductules. Large, thick-walled jars can serve as a valuable diagnostic indicator. • Harmless and not linked to a risk of hemorrhage.
Biliary hamartoma
• Believed to be a ductal plate deformity. Macroscopically, it presents as a tiny (<5mm) irregular grey lesion of the liver, perhaps multifocal. it consists microscopically tiny ductules situated inside a dense fibrous stroma. concentrated bile may be present within ductules. duct adenoma not constitute genuine tumor, but rather represents reactive proliferation ductular structures.
• Macroscopically, small, firm white lesions, typically larger than biliary hamartomas, often located subcapsularly. • Microscopically, small, uniform ductules that are more densely arranged than those in a biliary hamartoma. Bile is absent in the ductules.
Hemangioma • The most prevalent neoplasm of the liver. • Macroscopically, well-defined red neoplasms with a spongy texture because to the many vascular structures present inside them.
• Microscopically, it consists of many dilated blood arteries bordered by non-remarkable endothelial cells. • Benign lesions that are typically asymptomatic and necessitate no treatment.
Hepatic adenoma
• Uncommon neoplasm predominantly observed in young women of reproductive age. • Believed to be linked to the utilization of oral contraceptives.
• Macroscopically, single lesions frequently exceed 10 cm in size, exhibiting a softer consistency and a lighter hue compared to the surrounding liver tissue. • Hepatocytes are microscopically organized in plates that are 1 to 3 cells thick. Significant arteries are frequently observed within the lesion; however, portal tracts are lacking. Surgical excision is frequently conducted to avert the potentially lethal consequence of rupture and hemoperitoneum.
Focal nodular hyperplasia
• A benign non-neoplastic lesion typically observed in young women of reproductive age. • Believed to signify a limited region of liver hyperplasia resulting from alterations in blood flow linked to a pre-existing vascular abnormality.
A macroscopically distinct nodular region with a brighter hue than the surrounding liver tissue. Most lesions exhibit a distinctive center scar. •
Microscopic examination reveals nodules of hepatocytes interspersed with fibrous stroma harboring bile ductules. Large, thick-walled jars can serve as a valuable diagnostic indicator. • Harmless and not linked to a risk of hemorrhage.
Biliary hamartoma
• Believed to be a ductal plate deformity. Macroscopically, it presents as a tiny (<5mm) irregular grey lesion of the liver, perhaps multifocal. it consists microscopically tiny ductules situated inside a dense fibrous stroma. concentrated bile may be present within ductules. duct adenoma not constitute genuine tumor, but rather represents reactive proliferation ductular structures.
• Macroscopically, small, firm white lesions, typically larger than biliary hamartomas, often located subcapsularly. • Microscopically, small, uniform ductules that are more densely arranged than those in a biliary hamartoma. Bile is absent in the ductules.
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Pathology - Wilson's disease
Definition: An hereditary disease of copper metabolism resulting in the accumulation of toxic copper levels in the liver and brain. Epidemiology: Rare occurrence. • Although most cases manifest during childhood or young adulthood, the diagnosis should be contemplated as a potential etiology of liver disease at any age. • Both males and females are equally impacted. Genetics: An autosomal recessive condition resulting from mutations in the ATP7B gene, which encodes a copper-transporting ATPase. Approximately 100 distinct mutations have been identified, with the majority of individuals exhibiting compound heterozygosity, meaning they possess two separate mutant alleles.
Pathogenesis • The presence of two mutant ATP7B alleles disrupts normal copper transport, resulting in the accumulation of toxic copper levels in hepatocytes and basal ganglia.
Presentation • The majority of individuals exhibit symptoms in childhood or early adulthood, characterized by chronic liver disease or cirrhosis. • A minority of patients exhibit hepatic failure. • Approximately fifty percent of patients thereafter develop neuropsychiatric symptoms resulting from copper accumulation in the brain, typically following the onset of liver illness.
Macroscopy • At the time of presentation, the majority of patients have advanced disease, and the liver is firm due to significant fibrosis or cirrhosis. Histopathology: Liver biopsies reveal a chronic hepatitis pattern characterized by portal inflammation, dispersed lobular inflammation, and varying degrees of fibrosis, contingent upon the disease stage. The diagnosis is strongly indicated by elevated amounts of stainable copper or copper-associated protein in hepatocytes.
Prognosis • The condition is progressive and culminates in cirrhosis if left untreated. • Continuous administration of metal chelating medicines can avert this progression, if the diagnosis is established promptly. The risk of hepatocellular cancer is minimal.
Definition: An hereditary disease of copper metabolism resulting in the accumulation of toxic copper levels in the liver and brain. Epidemiology: Rare occurrence. • Although most cases manifest during childhood or young adulthood, the diagnosis should be contemplated as a potential etiology of liver disease at any age. • Both males and females are equally impacted. Genetics: An autosomal recessive condition resulting from mutations in the ATP7B gene, which encodes a copper-transporting ATPase. Approximately 100 distinct mutations have been identified, with the majority of individuals exhibiting compound heterozygosity, meaning they possess two separate mutant alleles.
Pathogenesis • The presence of two mutant ATP7B alleles disrupts normal copper transport, resulting in the accumulation of toxic copper levels in hepatocytes and basal ganglia.
Presentation • The majority of individuals exhibit symptoms in childhood or early adulthood, characterized by chronic liver disease or cirrhosis. • A minority of patients exhibit hepatic failure. • Approximately fifty percent of patients thereafter develop neuropsychiatric symptoms resulting from copper accumulation in the brain, typically following the onset of liver illness.
Macroscopy • At the time of presentation, the majority of patients have advanced disease, and the liver is firm due to significant fibrosis or cirrhosis. Histopathology: Liver biopsies reveal a chronic hepatitis pattern characterized by portal inflammation, dispersed lobular inflammation, and varying degrees of fibrosis, contingent upon the disease stage. The diagnosis is strongly indicated by elevated amounts of stainable copper or copper-associated protein in hepatocytes.
Prognosis • The condition is progressive and culminates in cirrhosis if left untreated. • Continuous administration of metal chelating medicines can avert this progression, if the diagnosis is established promptly. The risk of hepatocellular cancer is minimal.
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Pathology -Chronic renal disease.
Definition: A progressive and irreversible loss in renal function, classified into five phases based on estimated glomerular filtration rate (eGFR) (Table 9.1).
Epidemiology: Diabetes and kidney vascular disease contribute to the high prevalence of this condition. Aetiology • Diabetic and hypertensive nephropathy are the leading causes. • Other causes include reflex nephropathy, obstructive nephropathy, IgA nephropathy (IgAN), focal segmental glomerulosclerosis (FSGS), membranous nephropathy, systemic lupus erythematosus (SLE), myeloma, amyloidosis, medications, gout, and adult polycystic kidney disease (APKD).
Pathogenesis • A decrease in nephron mass below a certain level can lead to progressive renal damage, regardless of the underlying disease. • The sequence of events causing progressive renal damage is thought to be glomerular hyperfiltration, hypertension, injury, glomerulosclerosis, and tubulointerstitial fibrosis. • TGF-B plays a vital role in promoting renal scarring. Early illness is asymptomatic and can only be detected by measuring eGFR in at-risk patients, such as diabetics or hypertensives. • As patients advance, they become weary and have bone pain.
• End-stage renal failure patients with fluid overload and metabolic abnormalities may require prompt renal replacement therapy. Biochemistry • Urea and creatinine levels are elevated due to poor waste product excretion. • Reduced Calcium due to a shortage of active calcitriol. • increase Phosphate due to inadequate phosphate excretion. • Secondary hyperparathyroidism caused by low calcium levels. •Reduced haemoglobin levels due to decreased erythropoietin production.Loss of acid-base and sodium/potassium equilibrium happens later in chronic renal disease.
Complications • High risk of cardiovascular disease due to hypertension, vascular calcification, and hyperlipidemia. • Deranged calcium and phosphate metabolism causes renal bone disease, a complicated combination of hyperparathyroidism, osteomalacia, and osteoporosis.
Definition: A progressive and irreversible loss in renal function, classified into five phases based on estimated glomerular filtration rate (eGFR) (Table 9.1).
Epidemiology: Diabetes and kidney vascular disease contribute to the high prevalence of this condition. Aetiology • Diabetic and hypertensive nephropathy are the leading causes. • Other causes include reflex nephropathy, obstructive nephropathy, IgA nephropathy (IgAN), focal segmental glomerulosclerosis (FSGS), membranous nephropathy, systemic lupus erythematosus (SLE), myeloma, amyloidosis, medications, gout, and adult polycystic kidney disease (APKD).
Pathogenesis • A decrease in nephron mass below a certain level can lead to progressive renal damage, regardless of the underlying disease. • The sequence of events causing progressive renal damage is thought to be glomerular hyperfiltration, hypertension, injury, glomerulosclerosis, and tubulointerstitial fibrosis. • TGF-B plays a vital role in promoting renal scarring. Early illness is asymptomatic and can only be detected by measuring eGFR in at-risk patients, such as diabetics or hypertensives. • As patients advance, they become weary and have bone pain.
• End-stage renal failure patients with fluid overload and metabolic abnormalities may require prompt renal replacement therapy. Biochemistry • Urea and creatinine levels are elevated due to poor waste product excretion. • Reduced Calcium due to a shortage of active calcitriol. • increase Phosphate due to inadequate phosphate excretion. • Secondary hyperparathyroidism caused by low calcium levels. •Reduced haemoglobin levels due to decreased erythropoietin production.Loss of acid-base and sodium/potassium equilibrium happens later in chronic renal disease.
Complications • High risk of cardiovascular disease due to hypertension, vascular calcification, and hyperlipidemia. • Deranged calcium and phosphate metabolism causes renal bone disease, a complicated combination of hyperparathyroidism, osteomalacia, and osteoporosis.
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Pathology - Acinar Cell Carcinoma
Definition: A malignant epithelial tumor in the pancreas that produces enzymes.
Epidemiology • This rare tumor accounts for around 1% of all pancreatic tumors. • The majority occur in older persons.
Aetiology: unknown. Carcinogenesis has been linked to abnormalities in the APC/B-catenin pathway.
• Genetic alterations common in ductal adenocarcinoma are missing.
Presentation: General symptoms include stomach pain, weight loss, nausea, and diarrhea. • Approximately 10% of individuals experience polyarthralgia and multifocal fat necrosis due to lipase secretion.
Macroscopy reveals a well-defined soft tan tumor in the pancreas. • An extension outside the pancreas may be present. Histopathology • Neoplastic epithelial cells form in sheets, trabeculae, and acini. • Some cells have eosinophilic finely granular cytoplasm.
• Immunoreactivity for lipase, trypsin, and chymotrypsin is positive.
Prognosis: Aggressive malignant tumors. • The median survival time following diagnosis is 18 months, with a 5-year survival rate of
Definition: A malignant epithelial tumor in the pancreas that produces enzymes.
Epidemiology • This rare tumor accounts for around 1% of all pancreatic tumors. • The majority occur in older persons.
Aetiology: unknown. Carcinogenesis has been linked to abnormalities in the APC/B-catenin pathway.
• Genetic alterations common in ductal adenocarcinoma are missing.
Presentation: General symptoms include stomach pain, weight loss, nausea, and diarrhea. • Approximately 10% of individuals experience polyarthralgia and multifocal fat necrosis due to lipase secretion.
Macroscopy reveals a well-defined soft tan tumor in the pancreas. • An extension outside the pancreas may be present. Histopathology • Neoplastic epithelial cells form in sheets, trabeculae, and acini. • Some cells have eosinophilic finely granular cytoplasm.
• Immunoreactivity for lipase, trypsin, and chymotrypsin is positive.
Prognosis: Aggressive malignant tumors. • The median survival time following diagnosis is 18 months, with a 5-year survival rate of
