Tinea versicolor

Question 1

Etio

Answer 1

Malassezia furfur and M.globosa

Question 2

manifestation

Answer 2

Chronic.Well-demarcated patches with fine scale. Variable pigmentation:Hypo- and hyperpigmented; pink. Most commonly on the trunk.

Question 3

Demography

Answer 3

Young adults

Question 4

Predisposing factors

Answer 4

Sweating.Warm season or climates;tropical climate.Hyperhidrosis;aerobic exercise.Oily skin.Temperate zones:More common in the summertime;2%prevalence in temperate climates;up to 50% in tropics.Application of lipids such as cocoa butter

Question 5

Pathogenesis

Answer 5

Malassezia changes from a yeast to hyphal form under the influence of predisposing factors. Produces dicarboxylic acid, which inhibits tyrosinase in epidermal melanocytes and leads to
hypomelanosis

Question 6

Color

Answer 6

In non tanned skin lesions are brown or pink. On tanned skin, hypopigmented. In brown- or black-skinned persons, dark brown macules. Brown of varying intensities and hues. In time, individual lesions may enlarge and merge, orming extensive geographic areas.

Question 7

Distribution

Answer 7

Upper trunk, upper arms, neck, abdomen, axillae, groins, thighs, genitalia

Question 8

Diagnostics

Answer 8

KOH- Filamentous hyphae and globus yeast forms

Woods lamp- Blue green fluoresence of scales

Question 9

Treatment

Answer 9

topical agents.Selenium sulfide(2.5%)lotion or shampoo. Ketoconazole shampoo. Azole creams (ketoconazole, econazole, micronazole, or clotrimazole). terbinafine 1% solution

Systemic therapy Fluconazole 300 mg weekly × 3 weeks. Itraconazole 400 mg (singledose).

Secondary prophylaxis. topical agents weekly or systemic agents monthly