Dermatology Flashcards Preview

Step 2 > Dermatology > Flashcards

Flashcards in Dermatology Deck (19)
Loading flashcards...
1

macule vs papule vs patch vs plaque

Macule: flat, diff color 1cm
Plaque: elevated solid, >5mm

2

anaphylaxis, drug rxn: type of rxn, mechanism

Type 1, Antigen and IgE crosslink

3

Autoimmune hemolytic anemia, rheumatic fever: type rxn, mech

Type II, IgM, IgG bind and complement phagocytosis

4

SLE, polyarteritis nodosa: type, mech

III, immune complex activate complement

5

TB test, contact dermatitis: type, mech

IV, delayed, sensitized t cel

6

Pityrosporom ovale: type of organism, what causes

yeast, seb derm

7

Drug erruptions: time line and typical appearance

7-14 d after exposure
widespread, symmetrical, pruritic

8

SJS vs TEN: criteria and bx

SJS: 10% BSA, degen basal layer
TEN: >30%, full thickness eosinphilic epidermal necrosis

9

Workup for erythema nodosum

ASO titer, PPD, CXR (sarcoidosis), small bowel (IBD)

10

Bullous pemphigoid vs pemphigus vulgaris: anatomy affected, type of blister, mucosal involvement, nikolvsky sign

BP: basement membrane, anti-BP antigen, firm stable blisters, neg Nikolsk
PV: intraepidermal, anti-desmoglein, erosions, + nicolsky, mucosal involvement common

11

Appears as red vesicles at all stages, palms and soles spared

chicken pox

12

Small pink papules on the trunk, fever, GI: causative agent and tx

Salmonella typhi
fluoroquinalones and 3rd gen cephalosporins

13

Tx of nec fasc

surgical emergency
Abx: penicillin G or clinda for strep
metronidazole or 3rd gen cephalosporin for anaerobic

14

Tx and causative organism: tinea versicolor

malassezia furfur
Ketoconazole or selenium sulfide

15

Treatment of scabies

overnight with 5% permethrin from neck down, oral ivermectin

16

Intensely pruritic violaceous, flat-topped polygonal papules

lichen planus

17

HHV 6 or 7 infection

pityriassi rosea: "cigarrette paper", herald patch

18

Bacillary angiomatosis: mimic and tx

mimic of kaposi sarcoma, tx with erythromycin

19

nonspecific, psuoriatic-appearing plaque that is palpable and pruritic: dx and tx

mycosis fungoides, light therapy