UWORLD Misc Flashcards
Vitiligo
- macular depigmentation around acral and peri-orificial areas
- autoimmune destruction of melanocytes
- few pts remit
leprosy lesion
-areas of hypopigmentation with anesthesia
Gram negative rod nosocomial pneumonia
- Pseudomonas!
- 4th generation cephalosporin (e.g. cefepime) or Pip-Tazo
- Ceftriazone NOT effective
Molluscum contagiosum
- single or multiple round, dome shaped papules with central umbilication
- caused by poxvirus
- children: trunk and extremities
- adults: STI
- AIDS: disseminated, including face. diff to treat (CD4< 100)
- Tx: curettage or liquid nitrogen
Lichen Planus
- inflammatory (autoimmune?) condition
- pruritic, violaceous, flat papules with fine white streaks
- Tx: retinoids, steroids
Dermatitis herpetiformis
- uncommon disease with pruritus, papules, and vesicles over elbows, knees, buttocks, posterior neck, scalp
- Associated with HLA B8, DR3, DQw2
- associated with Celiac
Pneumoconiosis
- occupational restrictive (normal or high FEV1/FVC with low VC) lung disease
- Can have pleural calcifications (asbestos)
- Decreased DLCO (ILD)
Labs B12/Folate deficiency
- Both are involved in conversion of homocysteine to methionine. So deficiency will result in elevated homocysteine
- B12, unlike folate, converts methylmalonyl-CoA to Succinyl-CoA. So in B12 deficiency MMA will be elevated (normal in folate)
Alpha-fetoprotein
elevated in testicular germ cell tumors, HCCs, other cancer
Vanillylmandelic acid
elevated in urine of pts with Pheochromocytomas
Ferritin levels
increased in iron deficiency anemia and elevated in hemochromatosis, sideroblastic anemia, and acute inflammatory states
Tx aortic dissection
- BBs (labetolol): want to dec bp and HR, reduce stress on aorta
- Vasodilators can cause reflex tachycardia, used if refractory to BBs
Nifedipine
- anti-HTN
- vasodilator
Hydralizine
- anti-HTN
- vasodilator
AVF (causes, signs)
- Congenital: PDA, angiomas, pulmonary AVF, CNS AVF
- Acquired: Trauma, Iatrogenic (e.g. femoral cath), atherosclerosis (e.g aortacaval fistula), cancer
- Signs: widened pulse pressure, brisk carotid upstroke, systolic flow murmur, tachycardia, flushed extremities
- Can develop LVH and HF (due to increased preload). CO is HIGH (high-output Cardiac failure).
Causes of high-output cardiac failure
- AVF
- Thyrotoxicosis
- Paget disease
- Anemia
- Thiamine deficiency
cyclophosphamide (MoA, use, SEs)
- alkylating agent used as immunosuppressant
- in SLE, reserved for pts with renal/neuro involvement
- SEs: hemorrhagic cystitis, bladder carcinoma, sterility, myelosuppression.
Drugs causing cochlear dysfunction
cisplantin, carboplatin (testicular, ovarian, bladder cancer)
Aminoglycosides
drugs causing optic neuritis
ethambutol (TB), hydroxychloroquine (antimalarial, SLE, RA, etc)