A 32-year-old African American man presented with an asymptomatic rash of 10 years' duration.
The patient reported that eruption abated during the winter.
Tinea versicolor is often mistaken for vitiligo, which is more stable and does not produce
scales. Heat and humidity can exacerbate this condition; thus, the rash typically resolves during
the winter and worsens during the
This patient followed a daily regimen
of applying ketoconazole shampoo
to his body, leaving it on for
10 minutes, then rinsing. Systemic antifungal
agents are also effective; oral
ketoconazole can be used in recalcitrant
(Case and photograph courtesy of
Dr Raymond Kuwahara.)