23 - Nummular Eczema, Lichen Simplex Chronicus, and Prurigo Nodularis

Question 1

Y/N: Nummular dermatitis, lichen simplex chronicus, and prurigo nodularis often present with atopic dermatitis.

Answer 1

No - in the absence of atopic disease

Question 3

A large proportion of patients with nummular eczema have underlying

Answer 3

Allergic contact dermatitis

Question 4

Proposed triggers of nummular eczema

Answer 4

Atopy
Xerosis
Exogenous insult by irritants/allergens
Microbiome
Infection

Question 5

T cells in nummular vs atopic dermatitis

Answer 5

Higher T cell counts in nummular dermatitis

Question 6

Water barrier function in in nummular vs atopic dermatitis

Answer 6

Normal in nummular dermatitis

Question 7

Distinctive characteristics of nummular dermatitis

Answer 7

Pinpoint oozing and crusting

Question 8

Clinical course of nummular dermatitis

Answer 8

Chronic, with either an intermittent or persistent course

Question 9

Nummular eczema site of recurrence

Answer 9

Prior sites of involvement

Question 10

Most common sites of involvement of nummular eczema in men vs women

Answer 10

Men - lower extremities

Women - dorsal hands

Question 11

Prurigo nodules seen in AD

Answer 11

Besnier prurigo

Question 12

Lesional sparing on the upper back

Answer 12

Butterfly sign