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Pathology - Plasma cell myeloma
Definition: A diffuse neoplasm of plasma cells originating from bone marrow, characterized by the presence of paraproteins in serum and/or urine.
Epidemiology • Incidence ranges from 3 to 5 per 100,000 individuals. •
Manifestations are observed in older persons, with a mean diagnostic age of 70 years. • There is a masculine predominance of 1.5:1.
Aetiology • Unidentified.
Pathogenesis The neoplastic plasma cells produce cytokines that activate osteoclasts, resulting in lytic bone lesions. Circulating paraprotein inhibits normal immunoglobulin synthesis, hence elevating the susceptibility to infections. Free light chains traversing the kidneys contribute to renal failure.
Presentation: • Ostealgia and recurring infections. • Anemia, elevated ESR, hypercalcemia, and renal dysfunction are prevalent.
Histopathology A definitive diagnosis necessitates a bone marrow biopsy. • The bone marrow exhibits an abundance of monoclonal plasma cells organized in clusters, nodules, or sheets. • Clonality can be confirmed immunohistochemically by demonstrating kappa or lambda light chain restriction.
Prognosis • Myeloma is an incurable condition. • Average survival is 3–4 years post-diagnosis.
Definition: A diffuse neoplasm of plasma cells originating from bone marrow, characterized by the presence of paraproteins in serum and/or urine.
Epidemiology • Incidence ranges from 3 to 5 per 100,000 individuals. •
Manifestations are observed in older persons, with a mean diagnostic age of 70 years. • There is a masculine predominance of 1.5:1.
Aetiology • Unidentified.
Pathogenesis The neoplastic plasma cells produce cytokines that activate osteoclasts, resulting in lytic bone lesions. Circulating paraprotein inhibits normal immunoglobulin synthesis, hence elevating the susceptibility to infections. Free light chains traversing the kidneys contribute to renal failure.
Presentation: • Ostealgia and recurring infections. • Anemia, elevated ESR, hypercalcemia, and renal dysfunction are prevalent.
Histopathology A definitive diagnosis necessitates a bone marrow biopsy. • The bone marrow exhibits an abundance of monoclonal plasma cells organized in clusters, nodules, or sheets. • Clonality can be confirmed immunohistochemically by demonstrating kappa or lambda light chain restriction.
Prognosis • Myeloma is an incurable condition. • Average survival is 3–4 years post-diagnosis.
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Pathology - Mantle cell lymphoma
A mature B-cell neoplasm characterized by monomorphic, small to medium-sized lymphoid cells exhibiting uneven nuclear outlines and a CCND1 translocation.
Epidemiology • Constitutes 3–10% of all non-Hodgkin B-cell lymphomas. • Primarily occurs in adults, with a mean age of 60 years.
Aetiology: Unknown. Genetics • Nearly all instances exhibit a t(11;14) translocation involving the CCND1 (cyclin D1) and IGH genes. Deregulated expression of cyclin D1 leads to unrestrained proliferation of lymphoid cells.
Presentation: The majority of individuals exhibit lymph node involvement. The liver, spleen, bone marrow, or peripheral blood may also be affected. Extranodal areas, especially the gastrointestinal tract, may also be involved. Histopathology • Affected tissues are substituted by sheets of monomorphic, tiny to medium-sized lymphoid cells exhibiting irregular nuclear contours. • Hyalinized small blood arteries and dispersed epithelioid histiocytes are frequently observed. Immunophenotype: B-cell markers PAX5, CD20, and CD79a exhibit positivity. • CD5 and cyclin D1 exhibit positivity. • CD23 and CD10 are often negative.
Prognosis • Despite its unremarkable look, the prognosis is typically unfavorable, with a median survival of merely 3–5 years.
A mature B-cell neoplasm characterized by monomorphic, small to medium-sized lymphoid cells exhibiting uneven nuclear outlines and a CCND1 translocation.
Epidemiology • Constitutes 3–10% of all non-Hodgkin B-cell lymphomas. • Primarily occurs in adults, with a mean age of 60 years.
Aetiology: Unknown. Genetics • Nearly all instances exhibit a t(11;14) translocation involving the CCND1 (cyclin D1) and IGH genes. Deregulated expression of cyclin D1 leads to unrestrained proliferation of lymphoid cells.
Presentation: The majority of individuals exhibit lymph node involvement. The liver, spleen, bone marrow, or peripheral blood may also be affected. Extranodal areas, especially the gastrointestinal tract, may also be involved. Histopathology • Affected tissues are substituted by sheets of monomorphic, tiny to medium-sized lymphoid cells exhibiting irregular nuclear contours. • Hyalinized small blood arteries and dispersed epithelioid histiocytes are frequently observed. Immunophenotype: B-cell markers PAX5, CD20, and CD79a exhibit positivity. • CD5 and cyclin D1 exhibit positivity. • CD23 and CD10 are often negative.
Prognosis • Despite its unremarkable look, the prognosis is typically unfavorable, with a median survival of merely 3–5 years.
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Pathology - Classical Hodgkin lymphoma
A lymphoid tumor characterized by dysfunctional neoplastic B-cells, referred to as Hodgkin/Reed Sternberg (HRS) cells, situated amid a dense non-neoplastic inflammatory milieu.
Epidemiology • Bimodal age distribution, characterized by a high incidence between 15 and 35 years, and a secondary peak in later life. • Males are predominantly affected, except in the case of the nodular sclerosis variation, which exhibits equal incidence across genders.
Aetiology • Unknown; although, Epstein-Barr virus (EBV) infection has been associated with certain kinds.
Presentation • The majority of patients have localized lymphadenopathy. • Fever, nocturnal diaphoresis, and weight loss are prevalent (referred to as 'B symptoms').
Histopathology • Lymph nodes are infiltrated by varying quantities of neoplastic HRS cells amid a robust inflammatory milieu
The standard diagnosis The Reed-Sternberg cell is a substantial cell characterized by two prominent nuclei, each containing distinct eosinophilic nucleoli. Four histological subtypes are identified based on the quantity and characteristics of the HRS cells and the reactive background: nodular sclerosis, mixed cellularity, lymphocyte-rich, and lymphocyte-depleted. The immunophenotype of HRS cells is characterized by positivity for CD15 and negativity for CD30, exhibiting a distinctive membranous and Golgi staining pattern. PAX5 and MUM-1 are invariably positive in HRS cells, but CD20 and CD79a are typically negative or expressed at low levels.
Prognosis: Contemporary treatment protocols provide a cure rate over 85% for classical Hodgkin lymphoma. Nodular lymphocyte-predominant Hodgkin lymphoma Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) is acknowledged as a unique subtype of Hodgkin lymphoma. NLPHL constitutes 75% of all Hodgkin lymphomas. It generally occurs in young to middle-aged adults between the ages of 30 and 50. The atypical B-cells, referred to as lymphocyte-predominant cells, are immunophenotypically differentiated from classical HRS cells; they generally do not express CD30 and CD15, while exhibiting significant expression of CD20 and EMA. The disease progresses slowly and is seldom lethal.
A lymphoid tumor characterized by dysfunctional neoplastic B-cells, referred to as Hodgkin/Reed Sternberg (HRS) cells, situated amid a dense non-neoplastic inflammatory milieu.
Epidemiology • Bimodal age distribution, characterized by a high incidence between 15 and 35 years, and a secondary peak in later life. • Males are predominantly affected, except in the case of the nodular sclerosis variation, which exhibits equal incidence across genders.
Aetiology • Unknown; although, Epstein-Barr virus (EBV) infection has been associated with certain kinds.
Presentation • The majority of patients have localized lymphadenopathy. • Fever, nocturnal diaphoresis, and weight loss are prevalent (referred to as 'B symptoms').
Histopathology • Lymph nodes are infiltrated by varying quantities of neoplastic HRS cells amid a robust inflammatory milieu
The standard diagnosis The Reed-Sternberg cell is a substantial cell characterized by two prominent nuclei, each containing distinct eosinophilic nucleoli. Four histological subtypes are identified based on the quantity and characteristics of the HRS cells and the reactive background: nodular sclerosis, mixed cellularity, lymphocyte-rich, and lymphocyte-depleted. The immunophenotype of HRS cells is characterized by positivity for CD15 and negativity for CD30, exhibiting a distinctive membranous and Golgi staining pattern. PAX5 and MUM-1 are invariably positive in HRS cells, but CD20 and CD79a are typically negative or expressed at low levels.
Prognosis: Contemporary treatment protocols provide a cure rate over 85% for classical Hodgkin lymphoma. Nodular lymphocyte-predominant Hodgkin lymphoma Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) is acknowledged as a unique subtype of Hodgkin lymphoma. NLPHL constitutes 75% of all Hodgkin lymphomas. It generally occurs in young to middle-aged adults between the ages of 30 and 50. The atypical B-cells, referred to as lymphocyte-predominant cells, are immunophenotypically differentiated from classical HRS cells; they generally do not express CD30 and CD15, while exhibiting significant expression of CD20 and EMA. The disease progresses slowly and is seldom lethal.
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Pathology - Extranodal marginal zone lymphoma
Definition: An extranodal mature B-cell neoplasm primarily consisting of tiny neoplastic marginal zone cells.
Epidemiology • Constitutes 7–8% of all non-Hodgkin B-cell lymphomas. • Primarily occurs in adults with a mean age of 60. Locations of engagement • The gastrointestinal system constitutes 50% of all instances, with the stomach as the predominant site. • Additional locations encompass the lung, salivary gland, skin, thyroid, and breast.
Etiology • Gastric instances are generally linked to Helicobacter pylori. • Additional implicated species comprise Campylobacter jejuni (jejunum) and Borrelia burgdorferi (skin). • Autoimmune illnesses are also linked, such as Hashimoto’s thyroiditis (thyroid) and Sjögren’s syndrome (salivary gland). Pathogenesis • The majority of cases are preceded by a chronic inflammatory condition that results in the accumulation of extranodal lymphoid tissue. • Extended stimulation of lymphoid proliferation ultimately culminates in the transition into a neoplastic process.
Presentation • Symptoms associated with a mass at the affected location.
Histopathology • Affected tissues comprise a diverse assemblage of small neoplastic B-cells that encircle and may infiltrate the underlying reactive lymphoid follicles. • The cellular composition includes marginal zone cells, monocytoid-like cells, small lymphocytes, and dispersed immunoblasts and centroblast-like cells. • In epithelial-lined tissues, the neoplastic lymphoid cells generally infiltrate and obliterate the epithelium, resulting in lymphoepithelial lesions. Immunophenotype: B-cell markers PAX5, CD20, and CD79a are expressed positively. CD5, CD10, CD23, and cyclin D1 are all absent.
Prognosis: Exhibits indolent behavior with extended periods of disease-free remission post-treatment.
Definition: An extranodal mature B-cell neoplasm primarily consisting of tiny neoplastic marginal zone cells.
Epidemiology • Constitutes 7–8% of all non-Hodgkin B-cell lymphomas. • Primarily occurs in adults with a mean age of 60. Locations of engagement • The gastrointestinal system constitutes 50% of all instances, with the stomach as the predominant site. • Additional locations encompass the lung, salivary gland, skin, thyroid, and breast.
Etiology • Gastric instances are generally linked to Helicobacter pylori. • Additional implicated species comprise Campylobacter jejuni (jejunum) and Borrelia burgdorferi (skin). • Autoimmune illnesses are also linked, such as Hashimoto’s thyroiditis (thyroid) and Sjögren’s syndrome (salivary gland). Pathogenesis • The majority of cases are preceded by a chronic inflammatory condition that results in the accumulation of extranodal lymphoid tissue. • Extended stimulation of lymphoid proliferation ultimately culminates in the transition into a neoplastic process.
Presentation • Symptoms associated with a mass at the affected location.
Histopathology • Affected tissues comprise a diverse assemblage of small neoplastic B-cells that encircle and may infiltrate the underlying reactive lymphoid follicles. • The cellular composition includes marginal zone cells, monocytoid-like cells, small lymphocytes, and dispersed immunoblasts and centroblast-like cells. • In epithelial-lined tissues, the neoplastic lymphoid cells generally infiltrate and obliterate the epithelium, resulting in lymphoepithelial lesions. Immunophenotype: B-cell markers PAX5, CD20, and CD79a are expressed positively. CD5, CD10, CD23, and cyclin D1 are all absent.
Prognosis: Exhibits indolent behavior with extended periods of disease-free remission post-treatment.
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Pathology - Follicular lymphoma
Definition: A mature B-cell neoplasm consisting of germinal center cells (centrocytes and centroblasts).
Epidemiology • Represents approximately 20% of all non-Hodgkin lymphomas. • Primarily impacts individuals aged 50 to 60.
Aetiology: Unknown. Genetics: 90% of cases exhibit a distinctive t(14;18) translocation, leading to the fusion of the BCL2 gene with the IGH locus. Deregulated synthesis of the anti-apoptotic Bcl-2 protein leads to clonal proliferation.
Presentation: Extensive lymphadenopathy and splenomegaly. • Patients are often asymptomatic.
Histopathology Nodal architecture is supplanted by contiguous neoplastic follicles. Neoplastic follicles are devoid of mantle zones and consist of haphazardly arranged neoplastic centroblasts and centrocytes. Tangible body macrophages are typically lacking. • Neoplastic cells typically exhibit interfollicular dissemination. Bone marrow involvement is defined by paratrabecular clusters of malignant centrocytes and centroblasts. Immunophenotype PAX5, CD20, and CD79a, which are B-cell markers, exhibit positivity. Bcl-2, Bcl-6, and CD10 are furthermore positive. • CD5, CD23, and cyclin D1 are absent.
Prognosis is contingent upon the severity of the disease and the grade of the tumor. Approximately 25% progression into a high-grade lymphoma, typically diffuse large B-cell lymphoma, correlating with a swift clinical deterioration and mortality.
Definition: A mature B-cell neoplasm consisting of germinal center cells (centrocytes and centroblasts).
Epidemiology • Represents approximately 20% of all non-Hodgkin lymphomas. • Primarily impacts individuals aged 50 to 60.
Aetiology: Unknown. Genetics: 90% of cases exhibit a distinctive t(14;18) translocation, leading to the fusion of the BCL2 gene with the IGH locus. Deregulated synthesis of the anti-apoptotic Bcl-2 protein leads to clonal proliferation.
Presentation: Extensive lymphadenopathy and splenomegaly. • Patients are often asymptomatic.
Histopathology Nodal architecture is supplanted by contiguous neoplastic follicles. Neoplastic follicles are devoid of mantle zones and consist of haphazardly arranged neoplastic centroblasts and centrocytes. Tangible body macrophages are typically lacking. • Neoplastic cells typically exhibit interfollicular dissemination. Bone marrow involvement is defined by paratrabecular clusters of malignant centrocytes and centroblasts. Immunophenotype PAX5, CD20, and CD79a, which are B-cell markers, exhibit positivity. Bcl-2, Bcl-6, and CD10 are furthermore positive. • CD5, CD23, and cyclin D1 are absent.
Prognosis is contingent upon the severity of the disease and the grade of the tumor. Approximately 25% progression into a high-grade lymphoma, typically diffuse large B-cell lymphoma, correlating with a swift clinical deterioration and mortality.
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Pathology - Parathyroid hyperplasia
Definition: An augmentation of parathyroid cell mass without an identifiable trigger.
Epidemiology • Rare, constituting around 20% of primary hyperparathyroidism. • Women are impacted more significantly than men, at a ratio of 3:1.
Aetiology • The majority of patients exhibit sporadic hyperplasia without a discernible etiology. • Approximately 20% of cases are attributed to family illness, predominantly Multiple Endocrine Neoplasia (MEN). 1.
Pathogenesis • Parathyroid hyperplasia results in excessive secretion of parathyroid hormone (PTH). Elevated PTH levels induce hypercalcemia via enhancing calcium absorption from the gastrointestinal tract and kidneys, as well as by augmenting osteoclastic activity in bone.
Presentation • individuals exhibit primary hyperparathyroidism, a biochemical illness characterized by hypercalcemia and an abnormally normal or elevated PTH level. • Numerous individuals are asymptomatic when this condition is identified accidentally. • Some individuals may exhibit nonspecific symptoms such as tiredness, nausea, constipation, polyuria, and arthralgia.
Macroscopy • All parathyroid glands exhibit hypertrophy, with weights exceeding 60 mg and dimensions surpassing 6 mm, but with variability among the glands.
Histopathology • The principal characteristic is an augmentation of cellular mass within the gland, correlated with a reduction in adipose content. • Typically, there is an elevation in both primary and oncocytic cell types. Secondary fibrosis and hemorrhage are prevalent observations.
Prognosis: Excellent after subtotal parathyroidectomy.
Definition: An augmentation of parathyroid cell mass without an identifiable trigger.
Epidemiology • Rare, constituting around 20% of primary hyperparathyroidism. • Women are impacted more significantly than men, at a ratio of 3:1.
Aetiology • The majority of patients exhibit sporadic hyperplasia without a discernible etiology. • Approximately 20% of cases are attributed to family illness, predominantly Multiple Endocrine Neoplasia (MEN). 1.
Pathogenesis • Parathyroid hyperplasia results in excessive secretion of parathyroid hormone (PTH). Elevated PTH levels induce hypercalcemia via enhancing calcium absorption from the gastrointestinal tract and kidneys, as well as by augmenting osteoclastic activity in bone.
Presentation • individuals exhibit primary hyperparathyroidism, a biochemical illness characterized by hypercalcemia and an abnormally normal or elevated PTH level. • Numerous individuals are asymptomatic when this condition is identified accidentally. • Some individuals may exhibit nonspecific symptoms such as tiredness, nausea, constipation, polyuria, and arthralgia.
Macroscopy • All parathyroid glands exhibit hypertrophy, with weights exceeding 60 mg and dimensions surpassing 6 mm, but with variability among the glands.
Histopathology • The principal characteristic is an augmentation of cellular mass within the gland, correlated with a reduction in adipose content. • Typically, there is an elevation in both primary and oncocytic cell types. Secondary fibrosis and hemorrhage are prevalent observations.
Prognosis: Excellent after subtotal parathyroidectomy.
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Pathology - Addison's disease
Definition: Primary adrenocortical insufficiency. Epidemiology • Uncommon, with an estimated annual incidence of 1 in 100,000 individuals. • The majority of instances occur in young to middle-aged adults. • Women are disproportionately impacted compared to men.
Etiology • Autoimmune degradation in industrialized nations. • Disseminated TB in underdeveloped nations. • Alternative etiologies, such as adrenal metastases, are infrequent.
Pathogenesis • Addison's disease results in a significant deficiency of glucocorticoid and mineralocorticoid synthesis by the adrenal cortex.
Clinical manifestations do not become apparent until approximately 90% of the gland has been obliterated.
Presentation: Fatigue, lethargy, and debilitation. • Anorexia, nausea, emesis, and diarrhea. • Weight loss may be significant.
The clinical appearance is frequently subtle and non-specific, complicating the diagnosis.
Biochemistry • Sodium and potassium levels. • Urea concentration resulting from dehydration. • As much as fifty percent of patients have hypoglycemia. • Circulating anti-adrenal autoantibodies are frequently observed. Diagnosis • Individuals suspected of having Addison’s disease should undergo dynamic adrenal cortex testing via a Synacthen test. This entails an intramuscular injection of synthetic adrenocorticotropic hormone (ACTH). The typical response is an elevation in plasma cortisol levels. In Addison's disease, there is either an absence of cortisol elevation or merely a negligible increase.
Prognosis: Favorable if diagnosis is established and lifetime replacement medication is initiated with synthetic glucocorticoid (hydrocortisone) and mineralocorticoid (fludrocortisone). It is essential for patients to comprehend the necessity of augmenting their hydrocortisone dosage throughout any concurrent illness. 3 Untreated or inadequately treated Addison's disease may lead to abrupt adrenal failure ('Addisonian crisis'), characterized by a perilous combination of hypovolemic shock, significant hypoglycemia, and hyponatremia
Definition: Primary adrenocortical insufficiency. Epidemiology • Uncommon, with an estimated annual incidence of 1 in 100,000 individuals. • The majority of instances occur in young to middle-aged adults. • Women are disproportionately impacted compared to men.
Etiology • Autoimmune degradation in industrialized nations. • Disseminated TB in underdeveloped nations. • Alternative etiologies, such as adrenal metastases, are infrequent.
Pathogenesis • Addison's disease results in a significant deficiency of glucocorticoid and mineralocorticoid synthesis by the adrenal cortex.
Clinical manifestations do not become apparent until approximately 90% of the gland has been obliterated.
Presentation: Fatigue, lethargy, and debilitation. • Anorexia, nausea, emesis, and diarrhea. • Weight loss may be significant.
The clinical appearance is frequently subtle and non-specific, complicating the diagnosis.
Biochemistry • Sodium and potassium levels. • Urea concentration resulting from dehydration. • As much as fifty percent of patients have hypoglycemia. • Circulating anti-adrenal autoantibodies are frequently observed. Diagnosis • Individuals suspected of having Addison’s disease should undergo dynamic adrenal cortex testing via a Synacthen test. This entails an intramuscular injection of synthetic adrenocorticotropic hormone (ACTH). The typical response is an elevation in plasma cortisol levels. In Addison's disease, there is either an absence of cortisol elevation or merely a negligible increase.
Prognosis: Favorable if diagnosis is established and lifetime replacement medication is initiated with synthetic glucocorticoid (hydrocortisone) and mineralocorticoid (fludrocortisone). It is essential for patients to comprehend the necessity of augmenting their hydrocortisone dosage throughout any concurrent illness. 3 Untreated or inadequately treated Addison's disease may lead to abrupt adrenal failure ('Addisonian crisis'), characterized by a perilous combination of hypovolemic shock, significant hypoglycemia, and hyponatremia
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Pathology - Parathyroid adenoma
A nonmalignant epithelial tumor of the parathyroid gland.
Epidemiology: Common, constituting approximately 80% of primary hyperparathyroidism. • Peak incidence occurs between the ages of 50 and 60 years. • Women are impacted more significantly than men, at a ratio of 3:1
Aetiology • The underlying causes are inadequately comprehended, however previous irradiation of the neck seems to elevate the risk. The pathogenesis involves the autonomous secretion of parathyroid hormone (PTH) from the adenoma, resulting in hypercalcemia due to uncontrolled calcium mobilization from the bone and increased calcium absorption in the kidneys and gastrointestinal tract.
Presentation • Patients exhibit primary hyperparathyroidism, characterized by hypercalcemia accompanied by an abnormally normal or elevated PTH level. • A multitude of patients are asymptomatic when this is identified inadvertently. • Some individuals may exhibit nonspecific symptoms such as tiredness, nausea, constipation, polyuria, and arthralgia.
Macroscopy: A solitary parathyroid gland exhibits enlargement, measuring over 6mm in size and over 60mg in weight. The adenoma is often smooth, firm, soft, and light brown in hue. Histopathology: The parathyroid gland exhibits a well-defined, often encapsulated mass comprised of parathyroid epithelial cells devoid of adipose tissue. A compressed rim of normal parathyroid tissue frequently exists at one margin. Chief cells typically dominate, however an interspersing of oncocytic cells is also occasionally observed. The cells might be organized into solid sheets, trabeculae, or follicles. Stromal edema, fibrosis, and hemorrhage are frequently observed.
Prognosis: Parathyroid adenomas are benign tumors that can be effectively treated with surgical removal.
A nonmalignant epithelial tumor of the parathyroid gland.
Epidemiology: Common, constituting approximately 80% of primary hyperparathyroidism. • Peak incidence occurs between the ages of 50 and 60 years. • Women are impacted more significantly than men, at a ratio of 3:1
Aetiology • The underlying causes are inadequately comprehended, however previous irradiation of the neck seems to elevate the risk. The pathogenesis involves the autonomous secretion of parathyroid hormone (PTH) from the adenoma, resulting in hypercalcemia due to uncontrolled calcium mobilization from the bone and increased calcium absorption in the kidneys and gastrointestinal tract.
Presentation • Patients exhibit primary hyperparathyroidism, characterized by hypercalcemia accompanied by an abnormally normal or elevated PTH level. • A multitude of patients are asymptomatic when this is identified inadvertently. • Some individuals may exhibit nonspecific symptoms such as tiredness, nausea, constipation, polyuria, and arthralgia.
Macroscopy: A solitary parathyroid gland exhibits enlargement, measuring over 6mm in size and over 60mg in weight. The adenoma is often smooth, firm, soft, and light brown in hue. Histopathology: The parathyroid gland exhibits a well-defined, often encapsulated mass comprised of parathyroid epithelial cells devoid of adipose tissue. A compressed rim of normal parathyroid tissue frequently exists at one margin. Chief cells typically dominate, however an interspersing of oncocytic cells is also occasionally observed. The cells might be organized into solid sheets, trabeculae, or follicles. Stromal edema, fibrosis, and hemorrhage are frequently observed.
Prognosis: Parathyroid adenomas are benign tumors that can be effectively treated with surgical removal.
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Pathology - Parathyroid carcinoma
Definition: A malignant epithelial neoplasm originating from the parathyroid gland.
Epidemiology: Rare, constituting around 1% of primary hyperparathyroidism cases. • The majority manifest in individuals in their 40s and 50s, exhibiting no gender preference.
Aetiology • The cause remains unidentified, however anecdotal evidence suggests a connection with secondary hyperparathyroidism and previous neck irradiation. • Parathyroid cancer has not been associated with MEN 1.
Carcinogenesis • The most commonly observed aberration is the loss of genetic material at chromosome 13q.
Presentation • In contrast to individuals with parathyroid hyperplasia or adenoma, patients typically exhibit symptomatic primary hyperparathyroidism accompanied by a discernible neck mass. • Calcium concentrations are typically elevated (3.5–4mmol/L), accompanied by symptoms such as polyuria, polydipsia, weakness, renal colic, and ostealgia. Macroscopy: Parathyroid carcinomas are typically significantly larger than adenomas, averaging a weight of 12g. • They may exhibit well-defined margins or possess distinctly infiltrative borders.
Histopathology: Parathyroid carcinomas consist of sheets of epithelial cells that frequently appear deceptively benign. The development of follicles is atypical. • Tumors frequently possess a robust capsule and are interspersed with dense fibrous tissue bands that partition the tumor into several expansive nodules. • Capsular invasion, vascular invasion, tumor necrosis, and an elevated mitotic index are all strongly indicative of malignancy.
Prognosis • The 10-year survival rate is around 50%. • The majority of patients succumb to the unmanageable metabolic consequences of severe hyperparathyroidism caused by recurrent tumors.
Definition: A malignant epithelial neoplasm originating from the parathyroid gland.
Epidemiology: Rare, constituting around 1% of primary hyperparathyroidism cases. • The majority manifest in individuals in their 40s and 50s, exhibiting no gender preference.
Aetiology • The cause remains unidentified, however anecdotal evidence suggests a connection with secondary hyperparathyroidism and previous neck irradiation. • Parathyroid cancer has not been associated with MEN 1.
Carcinogenesis • The most commonly observed aberration is the loss of genetic material at chromosome 13q.
Presentation • In contrast to individuals with parathyroid hyperplasia or adenoma, patients typically exhibit symptomatic primary hyperparathyroidism accompanied by a discernible neck mass. • Calcium concentrations are typically elevated (3.5–4mmol/L), accompanied by symptoms such as polyuria, polydipsia, weakness, renal colic, and ostealgia. Macroscopy: Parathyroid carcinomas are typically significantly larger than adenomas, averaging a weight of 12g. • They may exhibit well-defined margins or possess distinctly infiltrative borders.
Histopathology: Parathyroid carcinomas consist of sheets of epithelial cells that frequently appear deceptively benign. The development of follicles is atypical. • Tumors frequently possess a robust capsule and are interspersed with dense fibrous tissue bands that partition the tumor into several expansive nodules. • Capsular invasion, vascular invasion, tumor necrosis, and an elevated mitotic index are all strongly indicative of malignancy.
Prognosis • The 10-year survival rate is around 50%. • The majority of patients succumb to the unmanageable metabolic consequences of severe hyperparathyroidism caused by recurrent tumors.
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Pathology- Iron deficiency anemia
Definition: A decrease in hemoglobin (Hb) concentration resulting from insufficient iron availability.
Epidemiology The predominant etiology of anemia. Etiology Chronic gastrointestinal blood loss is the predominant etiology. • Globally, this is typically associated with hookworm infection. • Frequent causes in affluent nations encompass peptic ulcers, gastric cancer, sigmoid diverticular disease, and colorectal carcinoma. Excessive menstrual bleeding in women may result in iron deficiency. Gastrointestinal disorders that lead to iron malabsorption can result in iron deficiency, such as celiac disease. 1 Excluding a gastrointestinal tract malignancy is essential in any adult patient presenting with unexplained iron deficiency anemia. Pathogenesis Iron is a vital component of the heme group in hemoglobin. Chronic iron deficiency disrupts the final stage in heme production.
Presentation • May be asymptomatic and identified with routine complete blood count. • Symptoms encompass fatigue and dyspnea during activity. • Certain cases may present with additional manifestations such as koilonychia, angular cheilitis, and glossitis. Complete blood count • reduced Hemoglobin. • reduced Mean corpuscular volume (MCV). • Decreased serum ferritin, decreased serum iron, decreased transferrin saturation, increased total iron binding capacity (TIBC).
Peripheral blood smear • Microcytic red blood cells. • Hypochromic pale red cells. • Heterogeneity in erythrocyte dimensions (anisocytosis) and morphology (poikilocytosis). • Elongated elliptical red blood cells, commonly referred to as 'pencil cells,' are frequently observed.
Bone marrow
Mild to moderate erythroid hyperplasia. • Lack of detectable iron
Definition: A decrease in hemoglobin (Hb) concentration resulting from insufficient iron availability.
Epidemiology The predominant etiology of anemia. Etiology Chronic gastrointestinal blood loss is the predominant etiology. • Globally, this is typically associated with hookworm infection. • Frequent causes in affluent nations encompass peptic ulcers, gastric cancer, sigmoid diverticular disease, and colorectal carcinoma. Excessive menstrual bleeding in women may result in iron deficiency. Gastrointestinal disorders that lead to iron malabsorption can result in iron deficiency, such as celiac disease. 1 Excluding a gastrointestinal tract malignancy is essential in any adult patient presenting with unexplained iron deficiency anemia. Pathogenesis Iron is a vital component of the heme group in hemoglobin. Chronic iron deficiency disrupts the final stage in heme production.
Presentation • May be asymptomatic and identified with routine complete blood count. • Symptoms encompass fatigue and dyspnea during activity. • Certain cases may present with additional manifestations such as koilonychia, angular cheilitis, and glossitis. Complete blood count • reduced Hemoglobin. • reduced Mean corpuscular volume (MCV). • Decreased serum ferritin, decreased serum iron, decreased transferrin saturation, increased total iron binding capacity (TIBC).
Peripheral blood smear • Microcytic red blood cells. • Hypochromic pale red cells. • Heterogeneity in erythrocyte dimensions (anisocytosis) and morphology (poikilocytosis). • Elongated elliptical red blood cells, commonly referred to as 'pencil cells,' are frequently observed.
Bone marrow
Mild to moderate erythroid hyperplasia. • Lack of detectable iron
