Derm

Question 1

Junctional nevus

Answer 1

Melanocytes develop at the junction between the epidermis and dermis

Children

Question 2

Compound nevus

Answer 2

Some melanocytes at junction and some extend to dermis

Question 3

Intradermal nevus

Answer 3

Melanocytes only seen in dermis

Adults

Question 4

Acanthosis, parakeratosis, and Munroe abscess

Answer 4

Histology of psoriasis

Question 5

Keratin-filled cysts (horn cysts)

Answer 5

Histo of seborrheic keratosis

Leser-Trelat sign: explosion of SK due to gastric carcinoma

Question 6

Verruca vulgaris histo

Answer 6

Koilocytosis

Question 7

Basal cell

Answer 7

Upper lip with ulceration and telangiectasia

peripheral palisading

Question 8

Pemphigus Vulgaris

Answer 8

IgG antibody against desmoglein
Basal cells remain intact (tombstone appearance)
Acantholysis of stratum spinosum
Thin-walled blisters that rupture easily and involves oral mucosa

Question 9

Bullous pemphigoid

Answer 9

IgG antibody against hemidesmosomes

Tense blister forms between epidermis and dermis

Question 10

Dermatitis Herpitiformis

Answer 10

IgA deposition at the dermal papillae

Strong association with celiac disease

Question 11

Erythema multiforme

Answer 11

Hypersensitivity reaction with targetoid rash and bullae

Associated with HSV