USMLE Exam Prep Questions And Answers (202472025)
Erythema multiforme - ✔✔target like/iris like skin lesions on palms and soles of feet
From: drug reaction or HSV or mycoplasma
mobiliform rash - ✔✔looks like measeles after drug reaction = mild urticaria
Urticaria - ✔✔
Porphyria cutanea tarde - ✔✔photosensitivity, hyper pigmentation
Bulla with sun exposure
Asoociated with: alcoholism, liver dz, hep C, oral contraceptives
Jaundice in 1st day or after 2nd week
Bilirubin > 12
Direct bili > 2 - ✔✔when is jaundice pathologic
Lichen planus - ✔✔well-defined area of purple-coloured, itchy, flat-topped papules
with interspersed lacy white lines
"6 Ps": planar (flat-topped), purple, polygonal, pruritic, papules, and plaques.
autoimmune: associated with Hep C and Graft vs Host
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