Lecture 187

Question 1

What testing should be included in the workup for seborrheic dermatitis if new onset or severe?

Answer 1

HIV

Question 2

What is the presentation of seborrheic dermatitis?

Answer 2

Itchy, ill-defined, greasy, yellow, fine white scales spread across the scalp and eyebrows

Question 3

What does a KOH test showing septate, branching hyphae indicate?

Answer 3

Tinea corporis

Question 4

What does a KOH test showing spaghetti and meatballs indicate?

Answer 4

Tinea versicolor

Question 5

What tests are used for secondary syphilis?

Answer 5

RPR/VDRL

Question 6

What does an ASO titer indicate?

Answer 6

Pityriasis rosea and guttate psoriasis

Question 7

What is the presentation of eruptive guttate psoriasis?

Answer 7

Rapidly appearing scattered, scaly, salmon pink papules in a generalized distribution, sparing the palms and soles; tear drops

Question 8

What is the presentation of tinea versicolor?

Answer 8

Asymptomatic lesions with minimal pruritus over months to years; sharply marginated, hyper- or hypopigmented, scaly, round or oval macules of varying sizes

Question 9

What is the presentation of psoriasis?

Answer 9

Thick silvery white scaly plaques along extensor surfaces and scalp, associated with joint pain

Question 10

What is the Koebner phenomenon?

Answer 10

Induction of new psoriasis skin lesions following local trauma or injury to the skin

Question 11

What occurs when a scale of psoriasis is scraped?

Answer 11

Pinpoint bleeding, known as Auspitz sign

Question 12

What nail findings are pathognomonic for psoriasis?

Answer 12

Onycholysis, pitting, and oil spots

Question 13

What is the most common cutaneous lymphoma?

Answer 13

Mycosis fungoides

Question 14

What is mycosis fungoides a clonal proliferation of?

Answer 14

T cells

Question 15

What are the three categories of mycosis fungoides skin lesions?

Answer 15

Patches, plaques, and tumor stage

Question 16

What classification of mycosis fungoides lesions appear as randomly distributed, scaling or non-scaling in different shades of red?

Answer 16

Patches

Question 17

What classification of mycosis fungoides lesions appear as round, oval, annular, and or bizarre configuration?

Answer 17

Plaques

Question 18

What is the presentation of lichen planus?

Answer 18

Purple, polygonal, pruritic, planar (flat), and papules

Question 19

What mucosal feature should be suspected in lichen planus?

Answer 19

Wickham’s striae

Question 20

What test should be completed during a work up for lichen planus?

Answer 20

Hepatitis C

Question 21

What microbe is the most common cause of tinea corporis?

Answer 21

Trichophyton rubrum

Question 22

What is the presentation of tinea corporis?

Answer 22

Small to large, scaly, sharply marginated annular plaques with a central clearing

Question 23

What is the presentation of dermatophytosis after application of topical steroids called?

Answer 23

Tinea incognito

Question 24

What microbe causes distal/lateral subungual onychomycosis?

Answer 24

T. Rubrum

Question 25

What microbe causes superficial white onychomycosis?

Answer 25

T. Mentagrophytes

Question 26

What microbe causes proximal subungual onychomycosis?

Answer 26

T. Rubrum

Question 27

What systemic infection is associated with proximal subungual onychomycosis?

Answer 27

HIV

Question 28

What is intertrigo?

Answer 28

Well-demarcated, erythematous patches or plaques that oppose each other on either side of the skin fold

Question 29

What microbe causes tinea cruris (jock itch)?

Answer 29

Trichophyton rubrum

Question 30

What is the presentation of tinea cruris?

Answer 30

Bilateral annular plaques with advancing border and central clearing most often in upper inner thighs and groin that spares the scrotum and penis

Question 31

What is inverse psoriasis?

Answer 31

Psoriasis localized to intertriginous areas that often involves the penis and scrotum

Question 32

What is the presentation of candidiasis?

Answer 32

Beefy red color lesions with satellite pustules that occur in skin folds, especially in the elderly, diabetic, or immunocompromised patients

Question 33

What dermal lesion is caused by Corynebacterium minutissimum?

Answer 33

Erythrasma

Question 34

What bacterial infection glows coral-red fluorescence under a Wood's light?

Answer 34

Erythrasma

Question 35

What is lichen simplex chronicus?

Answer 35

Solitary, pruritic eczematous eruption exacerbated by repetitive rubbing and scratching

Question 36

What is stasis dermatitis?

Answer 36

Inflammatory dermatosis of the lower extremities common in patients with chronic venous insufficiency