Derm

Question 1

Precursor to melanoma

Answer 1

Atypical nevus

- DEPTH of invasion –> mets

Question 2

Most common skin cancer, pallisading cells, pearly pink papule with telangiectasias, upper lip, little risk for mets

Answer 2

BCC

Question 3

Red, scaling/crusty, indurated/ulcerated lesion, on lower lip, arms, back, hands, little risk for mets, sheets and islands of cells with keratin pearls

Answer 3

SCC

- old age, fair skin, p53

Question 4

Precursor to SCC

Answer 4

Actinic keratosis & Bowen disease (SCC-IS)

Question 5

“Stuck on,” papillomatous epithelial proliferation of basaloid cells w/ horn cysts

Answer 5

Seborrheic keratosis

Question 6

Pruritic papules and plaques with fine white line that is lace-like over violet skin on the flexor surface of the wrists

Answer 6

Lichen Planus

• 5Ps of Planus
• “Wickham’s striae”

Question 7

Rough, scaly papule w/ hyperkeratosis, parakeratosis, atypical keratinocytes

Answer 7

Actinic keratosis

Question 8

Vesicular lesions on extensor surfaces

Answer 8

Dermatitis herpetiformis = Celiac

Question 9

Pruritic target lesions on palms and soles

Answer 9

Erythema multiforme
- HSV > mycoplasma
- drug reactions
\+ fever and mucosal = SJS
\+ sloughing = TEN

Question 10

Blisters on dorsal hands, hypertrichosis, hyperpgimentation, elevated serum and urine porphyrin, no abdominal pain

Answer 10

Porphyria cutanea tarda

• HCV, HIV, INC IRON, estrogen
• deficiency in uroporphyrinogen decarboxylase

Question 11

Sawtooth histology, HCV

Answer 11

Lichen planus

Question 12

Thrombosis of superficial veins that appear, resolve and reappear elsewhere on the body

Answer 12

• Trousseau’s sign (superficial migratory thrombophlebitis)*
• pancreatic cancer

Question 13

Dry scales, with flaking, pruritus on scalp, axilla, external ear

Answer 13

seborrheic dermatitis (dandruff)
- Tx = selenium sulfide or hydrocortizone

Question 14

Flushing of face with spicy foods, papular lesions, conjunctivitis, rhinophyma (large red nose)

Answer 14

Acne rosacea

• metronidazole gel
• oral tetracycline