The term versicolor refers to the presence of both hyper and hypo pigmented lesions. It is a superficial skin infection that occurs most often in young adults during hot and humid weather caused by Malassezia globosa and malassezia furfur
The infection is characterized by finely scaling hypo pigmented or hyper pigmented macules on the trunk and /or chest. Tinea versicolor despite its name , is not caused by Dermatophytes
Types
A peculiar aspect of Tinea versicolor is its propensity to present as either hypopigmented or hyperpigmented, finely scaling, round or perifollicular coalescing macular patches found primarily over the trunk
The eruption is almost always asymptomatic and only of cosmetic significance
Colours vary; In Pityriasis versicolor alba there is pale patches (hypo pigmentation) and in Pityriasis Versicolor rubra reddish brown (hyper pigmentation) is seen
Lesions do not tan in the sunlight, because of which they are more commonly noticed in the summer
Common sites are the trunk and chest, but neck, abdomen, upper arms and thighs may also be affected
Differential diagnosis
Vitiligo – characterized by depigmented macules without any scaling
Seborrheic dermatitis- patches have an erythematous yellowish tint and scales are soft and greasy
Pityriasis alba – characterized by poorly marginated, hypo pigmented, slightly scaly patches on the cheeks of young children
Investigation
Usually a clinical diagnosis is made
Confirmatory test: Potassium hydroxide (KOH) preparation of skin scrapings reveals a spaghetti and meatballs pattern
Ultraviolet wood lamp reveal a coppery orange or yellow fluorescence
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