USMLE STEP 3 EXAM INTEGRATED
PATIENT MANAGEMENT STUDY
GUIDE
◉ Keloids. Answer: B9 fibrous growths, scar tissue secondary over
production of extracellular matrix and dermal fibroblast
Tx:
intralesional glucocorticoids
can recur
◉ Candidial diaper infection. Answer: presence of tomato-red
plaques, satellite papule found on folds
Tx:
antimycotic agents (clotrimazole, nystatin)
◉ Diaper Dermatitis. Answer: differs from candida in that it doesn't
involved the folds
Tx:
zinc oxide crease
,◉ Lichen Planus. Answer: 4Ps: pruritic, planar, polygonal, purple
associated with advance liver disease due to HCV
Dx:
skin biopsy
◉ Porphyria cutanea tarda. Answer: characterized by painless
blisters, hyperthyroidism, hyper pigmentation, associated with hep
C
triggered by injection of certain substances (ethanol, estrogens)
◉ Tinea capitis. Answer: superficial dermatophytosis, MC in
children, causes scaly patches with slight erythema and hair loss
Dx:
KOH prep
Tx:
Oral griseofulvin, terbinafine
, ◉ Pediculosis (lice & crabs). Answer: tends to include the head,
easily transmitted by sharing hats and hairbrushes
Dx:
organism can readily be seen attached to hair-bearing areas
tx:
Topical permethrin
◉ Scabies. Answer: involves primarily the web spaces of the hands
an feed, extreme itching
Dx:
scraping out of the organism after mineral oil is applied to a burrow
tx:
Topical 5% permethrin
◉ Rubella (German measles). Answer: High fever and red
maculopapular rash together, starts head and spread down body
PATIENT MANAGEMENT STUDY
GUIDE
◉ Keloids. Answer: B9 fibrous growths, scar tissue secondary over
production of extracellular matrix and dermal fibroblast
Tx:
intralesional glucocorticoids
can recur
◉ Candidial diaper infection. Answer: presence of tomato-red
plaques, satellite papule found on folds
Tx:
antimycotic agents (clotrimazole, nystatin)
◉ Diaper Dermatitis. Answer: differs from candida in that it doesn't
involved the folds
Tx:
zinc oxide crease
,◉ Lichen Planus. Answer: 4Ps: pruritic, planar, polygonal, purple
associated with advance liver disease due to HCV
Dx:
skin biopsy
◉ Porphyria cutanea tarda. Answer: characterized by painless
blisters, hyperthyroidism, hyper pigmentation, associated with hep
C
triggered by injection of certain substances (ethanol, estrogens)
◉ Tinea capitis. Answer: superficial dermatophytosis, MC in
children, causes scaly patches with slight erythema and hair loss
Dx:
KOH prep
Tx:
Oral griseofulvin, terbinafine
, ◉ Pediculosis (lice & crabs). Answer: tends to include the head,
easily transmitted by sharing hats and hairbrushes
Dx:
organism can readily be seen attached to hair-bearing areas
tx:
Topical permethrin
◉ Scabies. Answer: involves primarily the web spaces of the hands
an feed, extreme itching
Dx:
scraping out of the organism after mineral oil is applied to a burrow
tx:
Topical 5% permethrin
◉ Rubella (German measles). Answer: High fever and red
maculopapular rash together, starts head and spread down body
