Doctoremia

🛑Tamoxifen Mechanism of action ✅ estrogen antagonist in breast ✅estrogen agonist in endometrium and bone

🛑osteoporosis in male ✅Man + Osteoporosis → think secondary causes → Hypogonadism is an important cause → check morning testosterone when clinically appropriate

☘️ Jaw claudication → Jaw pain on chewing → Giant cell arteritis ☘️ Upper-limb claudication → Arm pain with use → Takayasu arteritis ☘️ Neurogenic spinal claudication → Back/leg pain on walking → Lumbar spinal stenosis ☘️ Vascular claudication → Calf pain on walking → Peripheral arterial disease ©

✅Women with pulmonary hypertension should avoid becoming pregnant due to very high maternal mortality #note and Not

#remember ✅The principal cause of death in patients with Idiopathic thrombocytopenic purpura( ITP) is intracranial haemorrhage

🛑 clinical pearl Pheochromocytoma + nausea/vomiting → NEVER give metoclopramide 🚫

#remember ⚠️ Do not administer systemic corticosteroids in cases of suspected Strongyloides infection without first considering appropriate treatment, as steroid use may precipitate life-threatening hyperinfection. 🏥

অনেক ডিজিজেই তো hand joints involvement হয়:. Hand osteoarthritis কিভাবে চিনবেন? carpometacarpal and distal interphalangeal joint involvement হবে।

* ↑ homocysteine. * Normal methylmalonic acid. * No neurologic deficits. Other classic biochemical diseases 46. Alpha-1 antitrypsin deficiency * Misfolded A1AT accumulates in hepatocytes. * ↓ A1AT → panacinar emphysema, especially lower lobes. * Liver disease from intracellular accumulation. * Think smoker + young emphysema + liver disease. 47. Acute intermittent porphyria * ↓ Porphobilinogen deaminase. * ↑ ALA + ↑ porphobilinogen. * Abdominal pain + psychiatric symptoms + peripheral neuropathy. * No photosensitivity. * Attacks triggered by drugs, fasting, alcohol. 48. Porphyria cutanea tarda * ↓ Uroporphyrinogen decarboxylase. * Photosensitivity + blistering skin lesions. * Associated with alcohol, hepatitis C, estrogen, iron overload. * Most common porphyria. 49. Methylmalonic acidemia * ↓ Methylmalonyl-CoA mutase or B12 deficiency. * ↑ methylmalonic acid. * Metabolic acidosis + neurologic abnormalities. * Key distinction: B12 deficiency → ↑ MMA; folate deficiency → normal MMA. 50. Lesch-Nyhan syndrome * ↓ HGPRT → defective purine salvage. * ↑ uric acid. * Gout + dystonia + intellectual disability + self-mutilation. * X-linked recessive. * Think “self-biting child + hyperuricemia.”

* Treat with carnitine. 23. CPT-I deficiency * Impaired fatty-acid entry into mitochondria. * Hypoketotic hypoglycemia. * Liver predominantly affected. * ↓ ketones during fasting. 24. CPT-II deficiency * Long-chain fatty acids cannot effectively enter mitochondria in muscle. * Exercise-induced muscle pain + myoglobinuria. * Unlike CPT-I, predominantly muscle. 25. Primary carnitine transporter deficiency * ↓ Cellular uptake of carnitine. * Muscle weakness + cardiomyopathy + hypoketotic hypoglycemia. * Treat with carnitine. Lysosomal storage diseases 26. Tay-Sachs disease * ↓ Hexosaminidase A. * ↑ GM2 ganglioside. * Neurodegeneration + exaggerated startle + cherry-red macula. * No hepatosplenomegaly. 27. Niemann-Pick disease * ↓ Sphingomyelinase. * ↑ sphingomyelin. * Hepatosplenomegaly + neurodegeneration + cherry-red macula. * Important distinction: cherry-red spot + hepatosplenomegaly. 28. Gaucher disease * ↓ β-glucocerebrosidase. * ↑ glucocerebroside. * Hepatosplenomegaly + bone pain + pancytopenia. * Erlenmeyer flask deformity. * Gaucher cells = “crumpled tissue paper.” 29. Fabry disease * ↓ α-galactosidase A. * X-linked. * Angiokeratomas + acroparesthesias + renal disease + cardiomyopathy. * ↓ sweating. * Think “Fabry = pain + angiokeratoma.” 30. Krabbe disease * ↓ Galactocerebrosidase. * ↑ galactocerebroside/psychosine. * Peripheral neuropathy + developmental regression. * Globoid cells. 31. Metachromatic leukodystrophy * ↓ Arylsulfatase A. * ↑ sulfatides. * Demyelination + ataxia + dementia. * Peripheral and central nervous system involvement. 32. Hurler syndrome * ↓ α-L-iduronidase. * ↑ heparan sulfate + dermatan sulfate. * Coarse facial features + hepatosplenomegaly + developmental delay + corneal clouding. * Autosomal recessive. 33. Hunter syndrome * ↓ Iduronate sulfatase. * ↑ heparan sulfate + dermatan sulfate. * X-linked recessive. * Coarse facial features. * NO corneal clouding. 34. I-cell disease * Defective mannose-6-phosphate tagging. * Lysosomal enzymes fail to reach lysosomes. * Coarse facial features + skeletal abnormalities + severe developmental delay. * High lysosomal enzymes in plasma. Protein / collagen / structural diseases 35. Marfan syndrome * FBN1 mutation → abnormal fibrillin. * Aortic root dilation + lens subluxation upward/outward + long limbs. * AD. * Major danger = aortic dissection. 36. Ehlers-Danlos syndrome * Collagen synthesis/processing abnormalities. * Hypermobile joints + hyperextensible skin. * Vascular type → arterial/organ rupture. 37. Osteogenesis imperfecta * Type I collagen defect. * Fractures + blue sclera + hearing loss + dentinogenesis imperfecta. * Usually AD. 38. Menkes disease * Defective copper transport. * ↓ lysyl oxidase activity. * Kinky/“steel wool” hair + neurologic deterioration + hypopigmentation. * X-linked recessive. * ↓ copper and ↓ ceruloplasmin. 39. Wilson disease * ↓ ATP7B copper transport. * ↓ biliary copper excretion. * Liver disease + neurologic/psychiatric symptoms + Kayser-Fleischer rings. * ↓ ceruloplasmin + ↑ urinary copper. 40. Hemochromatosis * Excess iron absorption. * Diabetes + bronze skin + cirrhosis + cardiomyopathy. * ↑ ferritin + ↑ transferrin saturation. * HFE mutation → autosomal recessive. Vitamins / cofactors 41. Vitamin B1 deficiency — Thiamine * ↓ TPP-dependent enzymes. * Wernicke encephalopathy: confusion + ophthalmoplegia + ataxia. * Korsakoff: anterograde amnesia + confabulation. * Also causes beriberi. 42. Vitamin B3 deficiency — Niacin * Pellagra = dermatitis + diarrhea + dementia. * Can occur with Hartnup disease. * Niacin deficiency can result from carcinoid syndrome. 43. Vitamin B6 deficiency * ↓ PLP-dependent reactions. * Sideroblastic anemia + peripheral neuropathy + seizures. * Isoniazid can cause B6 deficiency. * Treat with pyridoxine. 44. Vitamin B12 deficiency * Megaloblastic anemia + neurologic deficits. * ↑ methylmalonic acid + ↑ homocysteine. * Posterior/lateral column demyelination. * Causes subacute combined degeneration. 45. Folate deficiency * Megaloblastic anemia.

🔥 TOP 50 HY BIOCHEMISTRY DISEASES 💯✔️ 1. Phenylketonuria (PKU) * ↓ Phenylalanine hydroxylase → ↑ phenylalanine, ↓ tyrosine. * Musty/mousy odor + intellectual disability + seizures + hypopigmentation. * Tyrosine becomes an essential amino acid. * BH₄ deficiency also causes PKU + ↓ neurotransmitters. * Treatment: low phenylalanine + tyrosine. 2. Maple Syrup Urine Disease * ↓ Branched-chain α-ketoacid dehydrogenase. * ↑ Leucine, isoleucine, valine. * Sweet-smelling urine + neurologic deterioration. * Treat with restriction of branched-chain amino acids. 3. Homocystinuria * Usually ↓ cystathionine β-synthase → ↑ homocysteine + ↑ methionine. * Marfanoid habitus + downward lens dislocation + thrombosis. * Cofactor = vitamin B6. * Think: homocysteine = thrombosis. 4. Alkaptonuria * ↓ Homogentisate oxidase. * Dark urine on standing + ochronosis + arthritis. * Tyrosine degradation disorder. 5. Hartnup disease * Defective neutral amino-acid transporter. * ↓ tryptophan → ↓ niacin. * Pellagra-like dermatitis + diarrhea + dementia. * Think “Hartnup → pellagra.” 6. Cystinuria * Defect in renal reabsorption of COLA: * Cystine * Ornithine * Lysine * Arginine * Hexagonal kidney stones. * Treat with hydration + urinary alkalinization. 7. Tyrosinemia type I * ↓ Fumarylacetoacetate hydrolase. * Liver failure + renal tubular dysfunction. * ↑ Succinylacetone. * Treatment: nitisinone. 8. Ornithine transcarbamylase deficiency * X-linked recessive. * ↑ ammonia + ↑ orotic acid + ↓ BUN. * No metabolic acidosis. * Classic: male infant with vomiting/lethargy after protein feeding. * Most common urea-cycle disorder. 9. Carbamoyl phosphate synthetase I deficiency * ↓ urea-cycle function → hyperammonemia. * Low orotic acid distinguishes it from OTC deficiency. * Autosomal recessive. 10. Citrullinemia * ↓ Argininosuccinate synthetase. * ↑ citrulline → hyperammonemia. * Autosomal recessive. Carbohydrate metabolism 11. Von Gierke disease — GSD I * ↓ Glucose-6-phosphatase. * Severe fasting hypoglycemia + hepatomegaly + lactic acidosis + hyperuricemia. * Cannot release free glucose from liver. * Think “G6P stuck.” 12. Pompe disease — GSD II * ↓ Lysosomal acid α-glucosidase. * Cardiomyopathy + hypotonia + macroglossia. * Lysosomal glycogen accumulation. * Normal blood glucose. 13. Cori disease — GSD III * ↓ Debranching enzyme. * Hepatomegaly + fasting hypoglycemia. * Milder than Von Gierke. * Limit dextrin accumulates. 14. McArdle disease — GSD V * ↓ Muscle glycogen phosphorylase. * Exercise intolerance + muscle cramps + myoglobinuria. * “Second-wind” phenomenon. * Normal blood lactate after exercise. 15. Hers disease — GSD VI * ↓ Liver glycogen phosphorylase. * Mild fasting hypoglycemia + hepatomegaly. * Usually less severe. 16. Hereditary fructose intolerance * ↓ Aldolase B. * Fructose-1-phosphate accumulates → phosphate trapping. * Hypoglycemia + vomiting after fruit/juice. * Avoid fructose, sucrose, sorbitol. 17. Essential fructosuria * ↓ Fructokinase. * Benign. * Fructose appears in urine. * No hypoglycemia. 18. Classic galactosemia * ↓ Galactose-1-phosphate uridyltransferase. * Jaundice + hepatomegaly + cataracts + E. coli sepsis. * Galactose → galactitol causes cataracts. * Avoid lactose/galactose. 19. G6PD deficiency * ↓ NADPH production → impaired glutathione reduction. * Oxidative stress → episodic hemolytic anemia. * Heinz bodies + bite cells. * Triggers: infections, sulfa drugs, dapsone, primaquine, fava beans. 20. Pyruvate dehydrogenase deficiency * Cannot convert pyruvate → acetyl-CoA. * ↑ pyruvate → ↑ lactate. * Neurologic abnormalities + lactic acidosis. * Ketogenic diet can help. Fatty acid / mitochondrial metabolism 21. MCAD deficiency * Defective medium-chain fatty-acid β-oxidation. * Hypoketotic hypoglycemia after fasting. * ↑ medium-chain fatty acids. * Infant becomes lethargic after illness/fasting. * Think “can’t use fat during fasting.” 22. Carnitine deficiency * ↓ Transport of long-chain fatty acids into mitochondria. * Muscle weakness + hypoketotic hypoglycemia.

50 High-Yield Embryology Buzzwords 🔥💯 1. Syncytiotrophoblast → Produces β-hCG 2. Cytotrophoblast → Mitotically active placental cells 3. Epiblast → All three germ layers 4. Hypoblast → Yolk sac only 5. Primitive streak → Mesoderm formation 6. Persistent primitive streak → Sacrococcygeal teratoma 7. Neural tube defect → Folate deficiency 8. Anencephaly → Failure of rostral neuropore closure 9. Spina bifida → Failure of caudal neuropore closure 10. Neural crest → PNS, melanocytes, adrenal medulla 11. Neural crest defect → DiGeorge syndrome 12. Neural crest defect → Persistent truncus arteriosus 13. Neural crest defect → Tetralogy of Fallot 14. Neural crest defect → Transposition of great arteries 15. Neural crest defect → Hirschsprung disease 16. 1st pharyngeal arch → Muscles of mastication (CN V) 17. 2nd pharyngeal arch → Facial expression (CN VII) 18. 3rd pharyngeal arch → Stylopharyngeus (CN IX) 19. 4th/6th pharyngeal arches → Laryngeal muscles (CN X) 20. 1st pouch → Middle ear + Eustachian tube 21. 2nd pouch → Palatine tonsils 22. 3rd pouch → Thymus + Inferior parathyroids 23. 4th pouch → Superior parathyroids 24. DiGeorge syndrome → Absent thymic shadow + hypocalcemia 25. Endocardial cushion defect → AV septal defect (Down syndrome) 26. Failure of aorticopulmonary septum → Persistent truncus arteriosus 27. Anterior displacement of infundibular septum → Tetralogy of Fallot 28. Failure of spiral septum → Transposition of great arteries 29. Patent ductus arteriosus → Continuous machine-like murmur 30. Prostaglandin E1 → Keeps PDA open 31. Indomethacin → Closes PDA 32. Omphalocele → Covered by peritoneum; associated with trisomies 33. Gastroschisis → No covering membrane; right of umbilicus 34. Persistent vitelline duct → Meckel diverticulum 35. Meckel diverticulum → Rule of 2s 36. Tracheoesophageal fistula → Polyhydramnios 37. Duodenal atresia → Double bubble sign + Down syndrome 38. Annular pancreas → Pancreatic tissue encircles duodenum 39. Malrotation → Midgut volvulus 40. Failure of recanalization → Esophageal/duodenal atresia 41. Mesonephric (Wolffian) duct → Male internal genitalia 42. Paramesonephric (Müllerian) duct → Female internal genitalia 43. Sertoli cells → Anti-Müllerian hormone (MIS) 44. Leydig cells → Testosterone 45. Cryptorchidism → Infertility + testicular cancer risk 46. Umbilical vein → Oxygenated blood 47. Umbilical arteries → Deoxygenated blood 48. Ductus venosus → Umbilical vein → IVC 49. Foramen ovale → RA → LA fetal shunt 50. Ductus arteriosus → Pulmonary artery → Aorta fetal shunt

high-yield anatomy for exams 💯🔥 1. Erb palsy → C5–C6 injury → “waiter’s tip.” 2. Klumpke palsy → C8–T1 injury → claw hand. 3. Long thoracic nerve injury → winged scapula → cannot abduct arm above 90°. 4. Axillary nerve injury → surgical neck fracture → deltoid weakness. 5. Radial nerve injury → midshaft humerus fracture → wrist drop. 6. Median nerve injury → thenar atrophy → ape hand. 7. Ulnar nerve injury → medial epicondyle/Guyon canal → interossei weakness. 8. Recurrent laryngeal nerve injury → hoarseness after thyroid surgery. 9. External branch of superior laryngeal nerve → inability to produce high-pitched sounds. 10. CN III palsy → “down and out” eye + ptosis + mydriasis. 11. Epidural hematoma → middle meningeal artery → lucid interval. 12. Subdural hematoma → bridging veins. 13. Berry aneurysm → subarachnoid hemorrhage. 14. Cavernous sinus contains CN III, IV, V1, V2, VI and internal carotid artery. 15. CN VI is most vulnerable in increased intracranial pressure. 16. Pituitary tumors commonly compress optic chiasm → bitemporal hemianopia. 17. MCA stroke → face/arm weakness > leg. 18. ACA stroke → leg weakness > arm. 19. PCA stroke → contralateral homonymous hemianopia with macular sparing. 20. Lateral medullary syndrome → PICA infarct. 21. Left recurrent laryngeal nerve loops under aortic arch. 22. Right recurrent laryngeal nerve loops under right subclavian artery. 23. Thoracic duct drains into left venous angle. 24. Right lymphatic duct drains right upper quadrant. 25. Phrenic nerve (C3-C5) supplies diaphragm. 26. Vagus nerve carries parasympathetics to thoracic and abdominal organs. 27. Esophageal varices occur at portosystemic anastomosis. 28. Azygos vein drains posterior thoracic wall. 29. Left atrial enlargement may compress esophagus. 30. Coarctation occurs near ligamentum arteriosum. 31. Appendix pain migrates from periumbilical (T10) to McBurney point. 32. Gallbladder referred pain → right shoulder (phrenic nerve). 33. Spleen injury → Kehr sign (left shoulder pain). 34. SMA supplies midgut. 35. IMA supplies hindgut. 36. Portal vein = splenic vein + superior mesenteric vein. 37. Left renal vein passes between SMA and aorta (nutcracker syndrome). 38. Ureter passes under uterine artery (“water under the bridge”). 39. Testicular artery arises directly from abdominal aorta. 40. Left gonadal vein drains into left renal vein; right drains into IVC. 41. Femoral nerve → knee extension. 42. Obturator nerve → thigh adduction. 43. Common fibular nerve injury → foot drop. 44. Tibial nerve injury → inability to plantarflex. 45. Superior gluteal nerve injury → positive Trendelenburg sign. 46. Inferior gluteal nerve injury → difficulty climbing stairs. 47. Posterior hip dislocation → sciatic nerve injury. 48. Anterior cruciate ligament prevents anterior tibial translation. 49. Medial meniscus is injured more often than lateral meniscus. 50. L4-L5 disc herniation commonly compresses the L5 nerve root.

✅ Type III hypersensitivity with purpuric rash of lower extremities, arthralgia & peripheral neuropathy, 🎯 আপনার diagnosis কি??

💉💉💉 🍀 Psychosis can be the 1st presentation of Wilson disease. 🍀 Psychosis can be the 1st presentation of Huntington disease. 🍀 Psychosis can be the 1st presentation of SLE—yes, SLE. ©

🖐️arthritis mutilans... psoriatic arthritis এর সবচেয়ে destructive form.. কার্টিলেজ এবং বোনস destruction এর জন্য digits shortening হয়ে এই অবস্থা হয়। telescoped skin বলা হয়ে থাকে। টেনে স্বাভাবিক ডিজিটের মতো করা যায় অনেকসময়।

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Massive PE + shock 🚨 =Immediate systemic thrombolysis (Alteplase) 💉 Massive PE + contraindication to thrombolysis 🛑 =Surgical embolectomy or catheter-directed thrombectomy 🏥 Massive PE + failed thrombolysis ❌ =Surgical embolectomy or catheter intervention 🛠️ Stable PE ✅ =Anticoagulation only (DOAC/LMWH 💊) Cardiac arrest from PE 💔 =CPR + thrombolysis 🚑