Section3: Papulosquamous and Eczematous Dermatoses

Question 1

Tell me about psoriasis?

Answer 1

Affects up to 2% of the population
* Chronic disorder in those with a polygenic predisposition combined with triggering factors such as infections (especially streptococcal & HIV infections) or medications (e.g. interferon, β-blockers, lithium, or oral CS taper).

Question 2

Antibiotics effective against staph aureus such as in bullous impetigo?

Answer 2

Augmentin
Cloxacillin
Cefalexin
Doxycycline/Minocycline

Question 3

Name of scale in secondary syphilis?

Answer 3

Typical Biett’s sign on dermoscopy, suggesting secondary syphilis

Question 4

Sabouraud’s agar is used for?

Answer 4

Growth medium containing peptones used to cultivate dermatophytes and other types of fungi
Can be used to confirm tine barbae

Question 5

Answer 5

Infantile seborrheic dermatitis, Glistening
red plaques of the neck, axillary and inguinal
folds as well as the penis and umbilicus

Question 6

Answer 6

Autosensitization dermatitis. There
is dermatitis of the extensor surfaces of the upper extremities in this patient with allergic contact dermatitis to neomycin as well as stasis dermatitis and venous ulceration

Question 7

Nummular eczema classically on?

Answer 7

Extremities, classically the legs in men and the arms in women

Question 8

Autosensitization dermatitis?

Answer 8

= ID reaction

Question 9

SIgns of chronic venous HTN?

Answer 9

Question 10

Answer 10

Id reaction in a child due to allergic contact dermatitis (ACD) to nickel. Square- shaped area of ACD due to nickel in a buckle surrounded by multiple crusted edematous

Question 11

Answer 11

Juvenile plantar dermatosis in
a child. Erythema and scaling of the plantar surface of the forefoot, especially the ball of the foot and the great and fifth toes. Note the glazed appearance of the skin of the left foot.
Thought to be related to hydration of the stratum corneum from wearing shoes made of impermeable materials and subsequent shearing of skin due to friction

Question 12

Answer 12

Dyshidrotic eczema (pompholyx).
Clusters of firm vesicles along the lateral aspect of the thumb and hypothenar eminence.
Ddx: palmoplantar pustulosis, herpetic whitlow, blistering dactylics

Question 13

Answer 13

Asteatotic eczema (eczema craquelé). When widespread, there can be involvement of the trunk and proximal extremities. Along with the shins, the area that surrounds
the posterior axillary fold is a common site for asteatotic eczema.

Question 14

Answer 14

Dyshidrotic eczema – histopathologic features. Spongiosis within the epidermis is accompanied by macrovesicles; the thickened stratum corneum points to an acral location.

Question 15

Causes of erythroderma?

Answer 15

Often divided into three major categories:
1) primary skin disorders
2) drug-related
3) Malignancy, especially Sezary and erythrodermic MF
4) Can be idiopathic, commonly in elderly, chronic, severe pruritus, need drug evaluation and CTCL evaluation

Question 16

Drugs related to erythroderma?

Answer 16

Allopurinol
Phenytoin
Gold
Sulfa drugs

Px: Abrupt, facial edema,

Question 17

Associations with Papuloerythroderma of Ofuji?

Answer 17

HIV and lymphoma