Yeast Infections PITYRIASIS (TINEA) VERSICOLOR

Question 1

PITYRIASIS (TINEA) VERSICOLOR. Lesion. Course

Answer 1

asymptomatic superficial fungal infection with brown/white scaling macules
• affected skin darker than surrounding skin in winter, lighter in summer (does not tan)

Question 2

PITYRIASIS (TINEA) VERSICOLOR

common sites:

Answer 2

upper chest and back

Question 3

PITYRIASIS (TINEA) VERSICOLOR

Pathophysiology

Answer 3

microbe produces azelaic acid -> inflammatory reaction inhibiting melanin synthesis yielding variable
pigmentation
• affinity for sebaceous glands; require fatty acids to survive

Question 4

PITYRIASIS (TINEA) VERSICOLOR

Etiologic agent

Answer 4

Pityrosporum ovale (Malassezia furfur)

Question 5

PITYRIASIS (TINEA) VERSICOLOR. Associated pathologies

Answer 5

folliculitis and seborrheic dermatitis

Question 6

PITYRIASIS (TINEA) VERSICOLOR

predisposing factors

Answer 6

summer, tropical climates, excessive sweating, Cushing’s syndrome, prolonged
corticosteroid use

Question 7

PITYRIASIS (TINEA) VERSICOLOR

Investigations

Answer 7

clinical diagnosis but can perform microscopic examination, KOH prep of scales for hyphae and spores

Question 8

PITYRIASIS (TINEA) VERSICOLOR Management

Answer 8

ketoconazole shampoo or cream daily
• topical terbinafine or ciclopirox olamine bid
• systemic fluconazole or itraconazole for 7 d if extensive