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Autosomal Dominant
Presentations of Autosomal Dominant diseases
| Question | Answer |
|---|---|
| Dwarfism; short limbs, normal trunk and head. Associated with advanced paternal age | Defect in FGFr3 Achondroplasia |
| Bilateral, massive enlargement of kidneys, flank pain, hematuria, hypertension, progresses to renal failure | APKD1 Chr. 16 ADPKD |
| Adenomatous polyps of the colon after puberty, progresses to colon cancer | Del. APC chr. 15 FAP |
| Elevated LDL, severe atherosclerotic disease, tendon xanthomas, MI<20 | Defect in LDL receptor Familial Hypercholesterolemia (Hyperlipidemia Type II |
| Telangiectasia, recurrent epistaxis, skin discolorations, AV malformations | Inherited blood vessel disorder Hereditary hemorrhagic telangiectasia Osler-Weber-Rendu |
| Spheroid erythrocytes, hemolytic anemia, ^MCHC | Defect in Ankyrin/Spectrin Hereditary spherocytosis |
| Depression, Dementia, Choreiform movements, caudate atrophy, 20-50 | CAG repeats on Chr. 4 --> low GABA and ACh in brain. Huntington's Dzs |
| Tall with long extremities, pectus excavatum, hyperextensible joints, long tapering fingers and toes Cystic medial necrosis of aorta --> aortic incompetence, dissecting aortic aneurysm, floppy mitral valve, subluxation of lenses | Fibrillin gene mutation --> connective tissue disorder affecting Skeleton, Heart, Eyes Marfan's Syndrome |
| Parathyroid tumors Pituitary tumors (prolactin or GH) Pancreatic endocrine tumor (ZE, VIP, insulinoma, glucagonoma) kidney stones and stomach ulcers | Multiple Endocrine Neoplasia Type 1 MEN 1 (3p's) |
| Parathyroid Tumor Pheochromocytoma Medullary Thyroid carcinoma (calcitonin) | ret gene defect MEN 2A (2P's) |
| Pheochromocytoma Oral/intestinal ganglioneuromatosis Tall, skinny, long finger and toes (marfanoid) | ret gene defect MEN 2B (1P) |
| Cafe-au-lait spots, neural tumors, Lisch nodules (pigmented iris hamartomas), optic pathway gliomas, skeletal disorders (scoliosis) | Mutated NF-1 gene, Chr. 17 (von Recklinghausen) NF-1 |
| Bilateral acoustic schwannomas, Juvenile cataracts | Mutated NF-2 gene, Chr. 22 NF-2 |
| Hamartomas in CNS, skin, and organs; cardiac rhabdomyomas, renal angiomylipoma, subependymal giant cell astrocytoma, mental retardation, seizures, hypopigmented "ash leaf spots", sebaceous adenoma, shagreen patch. | Tuberous Sclerosis |
| Cavernous hemangiomas in skin, mucosa, organs; Bilateral Renal cell carcinoma; Hemangioblastoma in retina, medulla, cerebellum; Pheochromocytomas | Del. VHL gene --> constitutive HIF and active angiogenic growth factors von Hippel Lindau dz |