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Pathology - Tuberous Sclerosis
Autosomal dominant condition caused by a mutation in one of several genes.
Pathology
A brain hamartoma, also known as a cortical tuber, is a solid nodule found in the cerebral cortex. It is made up of a disordered arrangement of neurons with large vesicular nuclei and eosinophilic cytoplasm.
Additionally linked to tumors that develop outside the central nervous system, such as cardiac rhabdomyomas, adenoma sebaceum on the face (a lesion made up of deformed blood vessels), renal angiomyolipomas (a lesion composed of deformed blood vessels, adipocytes, and smooth muscle), and cysts in the bone and lung.
Symptoms and Signs
Infants may experience seizures and developmental delay. They may also develop red nodules on the face known as adenoma sebaceum between the ages of 5 and 10. Other symptoms may include issues associated to heart rhabdomyoma and renal angiomyolipoma.
Treatment involves managing symptoms such as controlling seizures and providing genetic counseling.
Autosomal dominant condition caused by a mutation in one of several genes.
Pathology
A brain hamartoma, also known as a cortical tuber, is a solid nodule found in the cerebral cortex. It is made up of a disordered arrangement of neurons with large vesicular nuclei and eosinophilic cytoplasm.
Additionally linked to tumors that develop outside the central nervous system, such as cardiac rhabdomyomas, adenoma sebaceum on the face (a lesion made up of deformed blood vessels), renal angiomyolipomas (a lesion composed of deformed blood vessels, adipocytes, and smooth muscle), and cysts in the bone and lung.
Symptoms and Signs
Infants may experience seizures and developmental delay. They may also develop red nodules on the face known as adenoma sebaceum between the ages of 5 and 10. Other symptoms may include issues associated to heart rhabdomyoma and renal angiomyolipoma.
Treatment involves managing symptoms such as controlling seizures and providing genetic counseling.
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Pathology - Multiple Sclerosis
The cause is unidentified, but autoimmune, genetic, and environmental factors are suspected.
Incidence rises with distance from the equator and is more prevalent in individuals with HLA-DR2.
Typically occurs in Caucasian women aged 20 to 30.
Study of diseases
CNS: Numerous solid plaques indicating demyelination in the white matter of the CNS, particularly in the optic nerve, brainstem, and periventricular regions.
Microscopic examination reveals a reduction in oligodendrocytes, presence of monocytes, lymphocytes, and lipid-laden macrophages around blood vessels, as well as gliosis and increased astrocyte growth.
Symptoms and signs
The disease follows a pattern of relapse and remission, with remissions becoming incomplete over time. Symptoms include the classic Charcot triad of nystagmus, scanning speech, and intention tremor, as well as motor and sensory impairments affecting the trunk and extremities (hemiparesis, ataxia), visual impairment (optic neuritis, retrobulbar neuritis, internuclear ophthalmoplegia), and urinary/bowel incontinence due to sphincter control loss.
Lab results: Lumbar puncture indicates a slight increase in lymphocytes and high lgG levels, demonstrated by the presence of numerous oligoclonal bands on electrophoresis.
Treatment includes corticosteroids and other immunomodulator drugs such as ~-interferon and natalizumab.
The cause is unidentified, but autoimmune, genetic, and environmental factors are suspected.
Incidence rises with distance from the equator and is more prevalent in individuals with HLA-DR2.
Typically occurs in Caucasian women aged 20 to 30.
Study of diseases
CNS: Numerous solid plaques indicating demyelination in the white matter of the CNS, particularly in the optic nerve, brainstem, and periventricular regions.
Microscopic examination reveals a reduction in oligodendrocytes, presence of monocytes, lymphocytes, and lipid-laden macrophages around blood vessels, as well as gliosis and increased astrocyte growth.
Symptoms and signs
The disease follows a pattern of relapse and remission, with remissions becoming incomplete over time. Symptoms include the classic Charcot triad of nystagmus, scanning speech, and intention tremor, as well as motor and sensory impairments affecting the trunk and extremities (hemiparesis, ataxia), visual impairment (optic neuritis, retrobulbar neuritis, internuclear ophthalmoplegia), and urinary/bowel incontinence due to sphincter control loss.
Lab results: Lumbar puncture indicates a slight increase in lymphocytes and high lgG levels, demonstrated by the presence of numerous oligoclonal bands on electrophoresis.
Treatment includes corticosteroids and other immunomodulator drugs such as ~-interferon and natalizumab.
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Pathology - Guillain-Barre Syndrome
Typically follows a flu-like viral infection (such as EBV, HSV, CMV), but can also be linked to surgical operations and bacterial infections (Mycoplasma, Campylobacter).
Study of the biological processes that lead to disease. A viral infection triggers an immunological response mediated by T-cells, leading to the demyelination of peripheral nerves.
Peripheral nerves show infiltration by lymphocytes and macrophages in the endoneurium and perivenular areas, along with segmental demyelination.
Clinical Symptoms and Signs
Progressive muscle weakness and paralysis starting in the furthest lower limbs; lack of deep tendon reflexes; occasional sensory loss in limbs; facial weakness in both sides; aberrant autonomic function (irregular heartbeats, unstable blood pressure).
May advance to respiratory failure or develop into chronic inflammatory demyelinating polyradiculoneuropathy.
Laboratory results: Lumbar puncture reveals albuminocytologic separation in the cerebrospinal fluid, characterized by a significant increase in protein content with only a slight rise in cell count.
Therapies
Treatment includes plasmapheresis, intravenous immunoglobulin, and supportive treatment such as respiratory assistance till recovery.
Most patients have recovery within weeks to months, whereas 10%-20% are left with enduring disability.
Postinfectious encephalitis may occur after viral infections such as chicken pox, rubella, measles, and mumps, and is identified by temporary, extensive demyelination.
Typically follows a flu-like viral infection (such as EBV, HSV, CMV), but can also be linked to surgical operations and bacterial infections (Mycoplasma, Campylobacter).
Study of the biological processes that lead to disease. A viral infection triggers an immunological response mediated by T-cells, leading to the demyelination of peripheral nerves.
Peripheral nerves show infiltration by lymphocytes and macrophages in the endoneurium and perivenular areas, along with segmental demyelination.
Clinical Symptoms and Signs
Progressive muscle weakness and paralysis starting in the furthest lower limbs; lack of deep tendon reflexes; occasional sensory loss in limbs; facial weakness in both sides; aberrant autonomic function (irregular heartbeats, unstable blood pressure).
May advance to respiratory failure or develop into chronic inflammatory demyelinating polyradiculoneuropathy.
Laboratory results: Lumbar puncture reveals albuminocytologic separation in the cerebrospinal fluid, characterized by a significant increase in protein content with only a slight rise in cell count.
Therapies
Treatment includes plasmapheresis, intravenous immunoglobulin, and supportive treatment such as respiratory assistance till recovery.
Most patients have recovery within weeks to months, whereas 10%-20% are left with enduring disability.
Postinfectious encephalitis may occur after viral infections such as chicken pox, rubella, measles, and mumps, and is identified by temporary, extensive demyelination.
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Pathology: Charcot-Marie-Tooth Disease
The results stem from a mutation in one of the genes related to nerve myelination and function. Various types of the disease exhibit distinct inheritance patterns and associated mutations.
Typically manifests at age 20, but the age of onset varies depending on the type of sickness.
Pathology
Manifestation: Peripheral nerves enlargement; spinal cord posterior columns degeneration.
Microscopic findings show a "onion bulb" appearance of nerves due to many episodes of demyelination and remyelination, together with Schwann cell hyperplasia.
Pathophysiology: Mutations cause irregular myelin production, leading to demyelination and reduced nerve conduction speed. Schwann cells proliferate and remyelinate segments affected by demyelination.
The specific presentation varies depending on the particular form of the disease. However, typical symptoms include gradual weakening of the muscles in the limbs furthest from the torso, resulting in conditions such as foot drop, unsteady walking, deteriorating handwriting, and muscular spasms.
The physical examination reveals pes cavus deformity (high arch), "stork leg" deformity (due to calf muscle atrophy), scoliosis, reduced deep tendon reflexes, diminished sensibility to vibration and proprioception, and tremor.
Treatment of neuropathies, corrective surgery for joint abnormalities if necessary, and genetic counseling.
Charcot-Marie-Tooth disease is the most prevalent hereditary neurological condition.
The results stem from a mutation in one of the genes related to nerve myelination and function. Various types of the disease exhibit distinct inheritance patterns and associated mutations.
Typically manifests at age 20, but the age of onset varies depending on the type of sickness.
Pathology
Manifestation: Peripheral nerves enlargement; spinal cord posterior columns degeneration.
Microscopic findings show a "onion bulb" appearance of nerves due to many episodes of demyelination and remyelination, together with Schwann cell hyperplasia.
Pathophysiology: Mutations cause irregular myelin production, leading to demyelination and reduced nerve conduction speed. Schwann cells proliferate and remyelinate segments affected by demyelination.
The specific presentation varies depending on the particular form of the disease. However, typical symptoms include gradual weakening of the muscles in the limbs furthest from the torso, resulting in conditions such as foot drop, unsteady walking, deteriorating handwriting, and muscular spasms.
The physical examination reveals pes cavus deformity (high arch), "stork leg" deformity (due to calf muscle atrophy), scoliosis, reduced deep tendon reflexes, diminished sensibility to vibration and proprioception, and tremor.
Treatment of neuropathies, corrective surgery for joint abnormalities if necessary, and genetic counseling.
Charcot-Marie-Tooth disease is the most prevalent hereditary neurological condition.
Symptoms and Signs of Charcot - Marie- Tooth Disease
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Pathology - Neoplasms of the Vagina (Clear Cell Carcinoma, Squamous Cell Carcinoma)
Clear cell adenocarcinoma (CCA) is a rare kind of cancer that typically affects daughters of mothers who were treated with DES during pregnancy. It is commonly detected in individuals between the ages of 15 and 20.
Squamous cell carcinoma (SCC) is an uncommon kind of cancer that is linked to HPV infection.
Pathology
CCA: Gross: red granular lesion seen on the upper anterior vagina. The cells are vacuolated and contain glycogen. They are preceded by vaginal adenosis, which is characterized by columnar epithelial-lined glands in locations that are typically lined by stratified squamous epithelium.
SCC: Gross finding of an invasive plaque-like mass located in the upper posterior vagina. The process starts with epithelial thickening linked to dysplastic alterations at a microscopic level, which then progresses to invasive squamous cell carcinoma with keratinization.
Clinical Symptoms
CCA may be asymptomatic and have a gradual onset characterized by vaginal hemorrhage.
SCC may be asymptomatic; can present with irregular spotting, vaginal discharge, vulvar discomfort, and pruritus.
Utilizing surgery and irradiation, together with vigilant monitoring and screening for high-risk individuals.
Sarcoma botryoides is a rare type of polypoidal embryonal rhabdomyosarcoma, and it is the most prevalent sarcoma found in infants under the age of 5. The condition appears as a tumor that looks like a cluster of grapes extending into the vagina and necessitates surgical removal and chemotherapy.
Clear cell adenocarcinoma (CCA) is a rare kind of cancer that typically affects daughters of mothers who were treated with DES during pregnancy. It is commonly detected in individuals between the ages of 15 and 20.
Squamous cell carcinoma (SCC) is an uncommon kind of cancer that is linked to HPV infection.
Pathology
CCA: Gross: red granular lesion seen on the upper anterior vagina. The cells are vacuolated and contain glycogen. They are preceded by vaginal adenosis, which is characterized by columnar epithelial-lined glands in locations that are typically lined by stratified squamous epithelium.
SCC: Gross finding of an invasive plaque-like mass located in the upper posterior vagina. The process starts with epithelial thickening linked to dysplastic alterations at a microscopic level, which then progresses to invasive squamous cell carcinoma with keratinization.
Clinical Symptoms
CCA may be asymptomatic and have a gradual onset characterized by vaginal hemorrhage.
SCC may be asymptomatic; can present with irregular spotting, vaginal discharge, vulvar discomfort, and pruritus.
Utilizing surgery and irradiation, together with vigilant monitoring and screening for high-risk individuals.
Sarcoma botryoides is a rare type of polypoidal embryonal rhabdomyosarcoma, and it is the most prevalent sarcoma found in infants under the age of 5. The condition appears as a tumor that looks like a cluster of grapes extending into the vagina and necessitates surgical removal and chemotherapy.
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Pathology - Pelvic Inflammatory Disease
Common causes are Chlamydia trachomatis (subacute), Neisseria gonorrhoeae (acute), Gardnerella vaginalis, and Trichomonas vaginalis.
Typically seen in young women who have not given birth and are sexually active with several partners.
The Fallopian tubes exhibit swelling of the outer layer with fibrin covering, pus inside the tube, which can lead to the formation of a pyosalpinx or a hydrosalpinx.
Infection can also affect the ovaries and other pelvic structures.
Symptoms include high fever, lower abdomen pain, cervical motion soreness (chandelier sign), purulent cervical discharge, and right upper quadrant (RUQ) pain indicating perihepatitis (Fitz-Hugh-Curtis syndrome).
Sequelae of previous pelvic inflammatory disease (PID) may involve subsequent ectopic pregnancy, infertility, chronic pelvic pain, and adhesions.
Antibiotics are efficient against the organism that causes the infection.
Ectopic pregnancy commonly happens in the fallopian tubes but can also occur in the ovary, abdominal cavity, or cervix. Risk factors include of a history of salpingitis, endometriosis, or tubal ligation. Symptoms include abdominal pain occurring 6 weeks after the previous menstruation, vaginal bleeding, and increased levels of hCG, which are below the typical range for the stage of pregnancy.
Common causes are Chlamydia trachomatis (subacute), Neisseria gonorrhoeae (acute), Gardnerella vaginalis, and Trichomonas vaginalis.
Typically seen in young women who have not given birth and are sexually active with several partners.
The Fallopian tubes exhibit swelling of the outer layer with fibrin covering, pus inside the tube, which can lead to the formation of a pyosalpinx or a hydrosalpinx.
Infection can also affect the ovaries and other pelvic structures.
Symptoms include high fever, lower abdomen pain, cervical motion soreness (chandelier sign), purulent cervical discharge, and right upper quadrant (RUQ) pain indicating perihepatitis (Fitz-Hugh-Curtis syndrome).
Sequelae of previous pelvic inflammatory disease (PID) may involve subsequent ectopic pregnancy, infertility, chronic pelvic pain, and adhesions.
Antibiotics are efficient against the organism that causes the infection.
Ectopic pregnancy commonly happens in the fallopian tubes but can also occur in the ovary, abdominal cavity, or cervix. Risk factors include of a history of salpingitis, endometriosis, or tubal ligation. Symptoms include abdominal pain occurring 6 weeks after the previous menstruation, vaginal bleeding, and increased levels of hCG, which are below the typical range for the stage of pregnancy.
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Pathology - Placental Attachment Abnormalities (Abruptio Placentae, Placenta Previa, Placenta Accreta)
Abruptio placentae can be linked to disseminated intravascular coagulation (DIC) and has a higher risk when combined with smoking, cocaine use, and hypertension.
Placenta accreta is more likely to occur in individuals with previous C-section scars or endometrial irritation.
Placenta previa is more likely to occur in individuals with previous C-section scars.
Abruptio placentae refers to the premature detachment of the placenta.
Placenta accreta occurs when a faulty decidual layer enables the placenta to connect directly to the myometrium.
Placenta previa is when the placenta attaches to the lower part of the uterus or cervix, potentially blocking the cervical opening, and it can occur alongside placenta accreta.
Abruptio placentae is characterized by painful uterine bleeding typically occurring in the third trimester and may lead to fetal death.
Placenta accreta leads to significant bleeding following childbirth.
Placenta previa is characterized by painless bleeding during any trimester and can lead to premature childbirth.
Abruptio placentae requires immediate delivery of the fetus and management of maternal hemorrhage.
Hysterectomy may be required to halt bleeding in cases with placenta accreta.
Placenta previa may need bed rest and potential hospitalization.
Abruptio placentae can be linked to disseminated intravascular coagulation (DIC) and has a higher risk when combined with smoking, cocaine use, and hypertension.
Placenta accreta is more likely to occur in individuals with previous C-section scars or endometrial irritation.
Placenta previa is more likely to occur in individuals with previous C-section scars.
Abruptio placentae refers to the premature detachment of the placenta.
Placenta accreta occurs when a faulty decidual layer enables the placenta to connect directly to the myometrium.
Placenta previa is when the placenta attaches to the lower part of the uterus or cervix, potentially blocking the cervical opening, and it can occur alongside placenta accreta.
Abruptio placentae is characterized by painful uterine bleeding typically occurring in the third trimester and may lead to fetal death.
Placenta accreta leads to significant bleeding following childbirth.
Placenta previa is characterized by painless bleeding during any trimester and can lead to premature childbirth.
Abruptio placentae requires immediate delivery of the fetus and management of maternal hemorrhage.
Hysterectomy may be required to halt bleeding in cases with placenta accreta.
Placenta previa may need bed rest and potential hospitalization.
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Pathology - Preeclampsia and Eclampsia
Risk factors include of underlying hypertension, diabetes, chronic renal illness, autoimmune disorders, or twin gestation.
Occurs in 5%-10% of pregnant women, typically in the third trimester of their first pregnancy.
Evidence of infarction, retroplacental hematomas, reduced vascularity, and fibrinoid necrosis observed in the placenta.
Pathophysiology: An inherent flaw in the invading cytotrophoblast causes the restructuring of the uterine vasculature, resulting in placental ischemia. Reduced placental perfusion triggers vasoconstrictive effects that contribute to toxemic hypertension in vulnerable women.
Preeclampsia is characterized by a triad of hypertension, proteinuria, and edema, along with symptoms such as headache, hazy vision, and stomach pain.
Eclampsia is characterized by the presence of seizures, impaired mental state, hyperreflexia, and perhaps disseminated intravascular coagulation (DIC) in addition to the triad of symptoms seen in preeclampsia.
Laboratory results indicate thrombocytopenia, increased liver function tests, hyperuricemia, and hemolytic anemia.
Therapy
Treatment for preeclampsia includes delivering the fetus promptly, bed rest, limiting salt intake, and managing hypertension.
Eclampsia is a medical emergency that requires treating seizures with intravenous magnesium sulfate and diazepam, followed by delivering the fetus.
HELLP syndrome is a severe form of preeclampsia characterized by hemolysis, increased liver function tests, and low platelet count.
Risk factors include of underlying hypertension, diabetes, chronic renal illness, autoimmune disorders, or twin gestation.
Occurs in 5%-10% of pregnant women, typically in the third trimester of their first pregnancy.
Evidence of infarction, retroplacental hematomas, reduced vascularity, and fibrinoid necrosis observed in the placenta.
Pathophysiology: An inherent flaw in the invading cytotrophoblast causes the restructuring of the uterine vasculature, resulting in placental ischemia. Reduced placental perfusion triggers vasoconstrictive effects that contribute to toxemic hypertension in vulnerable women.
Preeclampsia is characterized by a triad of hypertension, proteinuria, and edema, along with symptoms such as headache, hazy vision, and stomach pain.
Eclampsia is characterized by the presence of seizures, impaired mental state, hyperreflexia, and perhaps disseminated intravascular coagulation (DIC) in addition to the triad of symptoms seen in preeclampsia.
Laboratory results indicate thrombocytopenia, increased liver function tests, hyperuricemia, and hemolytic anemia.
Therapy
Treatment for preeclampsia includes delivering the fetus promptly, bed rest, limiting salt intake, and managing hypertension.
Eclampsia is a medical emergency that requires treating seizures with intravenous magnesium sulfate and diazepam, followed by delivering the fetus.
HELLP syndrome is a severe form of preeclampsia characterized by hemolysis, increased liver function tests, and low platelet count.
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Pathology - Hydatidiform Mole and Gestational Choriocarcinoma
Hydatidiform mole (HM) occurs as a result of embryonic chromosomal anomalies. A complete mole has a chromosomal makeup of 46, XX, with all chromosomes originating from the sperm. A partial mole is triploid (69, XXY) or tetraploid, typically resulting from the fertilization of an ovum by several sperm.
Gestational choriocarcinoma (GC) is more common in Asia and Africa and is typically preceded by a complete hydatidiform mole, abortions, or ectopic or normal pregnancies.
HM: Features include edematous chorionic villi with cystic swelling forming grapelike clusters, hyperplasia of trophoblastic cells, honeycombed appearance of the uterus, and lack of fetal components. Partial findings include swollen villi and the presence of embryonic body components.
GC :A tumor including necrotic and hemorrhagic patches made up of cells resembling syncytiotrophoblasts and cytotrophoblasts, with potential endometrial penetration.
HM: may manifest as nausea and vomiting, painless vaginal bleeding typically occurring in the first trimester, enlarged uterus for gestational age, and maybe hypertension in the first trimester.
Ultrasound shows a snowstorm look without detection of fetal or placental components.
GC:Excessive vaginal bleeding following the removal of a mole or after giving birth/miscarriage; hemoptysis caused by early spread of the condition to the lungs through the blood.
Laboratory results: Elevated serum hCG levels for the stage of pregnancy (HM and GC).
Performing immediate uterine evacuation via suction.
GC: Surgical excision; chemotherapy.
Hydatidiform mole (HM) occurs as a result of embryonic chromosomal anomalies. A complete mole has a chromosomal makeup of 46, XX, with all chromosomes originating from the sperm. A partial mole is triploid (69, XXY) or tetraploid, typically resulting from the fertilization of an ovum by several sperm.
Gestational choriocarcinoma (GC) is more common in Asia and Africa and is typically preceded by a complete hydatidiform mole, abortions, or ectopic or normal pregnancies.
HM: Features include edematous chorionic villi with cystic swelling forming grapelike clusters, hyperplasia of trophoblastic cells, honeycombed appearance of the uterus, and lack of fetal components. Partial findings include swollen villi and the presence of embryonic body components.
GC :A tumor including necrotic and hemorrhagic patches made up of cells resembling syncytiotrophoblasts and cytotrophoblasts, with potential endometrial penetration.
HM: may manifest as nausea and vomiting, painless vaginal bleeding typically occurring in the first trimester, enlarged uterus for gestational age, and maybe hypertension in the first trimester.
Ultrasound shows a snowstorm look without detection of fetal or placental components.
GC:Excessive vaginal bleeding following the removal of a mole or after giving birth/miscarriage; hemoptysis caused by early spread of the condition to the lungs through the blood.
Laboratory results: Elevated serum hCG levels for the stage of pregnancy (HM and GC).
Performing immediate uterine evacuation via suction.
GC: Surgical excision; chemotherapy.
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Pathology- Varicocele, Hydrocele and Spermatocele
Varicocele
Definition: Enlargement of the network of veins in the scrotum known as the pampiniform venous plexus.
Clinical symptoms: Linked to infertility due to elevated heat from blood collection, potentially harming sperm; some individuals may have scrotal soreness.
Treatment: Surgery for infertility causes
Varicocele
Definition: Enlargement of the network of veins in the scrotum known as the pampiniform venous plexus.
Clinical symptoms: Linked to infertility due to elevated heat from blood collection, potentially harming sperm; some individuals may have scrotal soreness.
Treatment: Surgery for infertility causes
Hydrocele
Hydrocele is a condition characterized by the accumulation of fluid in the tunica vaginalis of the scrotum, typically found on the front and side of the testicle. It occurs when there is a continuous passage between the processus vaginalis and the scrotum, allowing peritoneal fluid to enter. In some cases, hydrocele can also be a result of infection by Wuchereria bancrofti.
Clinical presentation: Appears as a painless swelling of the scrotum that is transparent when examined with a flashlight.
Treatment: Monitoring.
Spermatocele
Spermatocele is the accumulation of sperm within the testes, typically located near the head of the epididymis on the superior surface of the testicle.
Clinical manifestations: Usually asymptomatic; transparent upon flashlight examination.
Treatment: Monitoring.
Failure of a scrotal anomaly to transilluminate is suggestive of a solid lesion and requires further investigation with ultrasonography.
