Ben, a 17-year-old wrestler, developed a lesion on his upper back.The lesion was relatively round and consisted of a pink scaly rough center and raised edge.While it wasn't painful, the itching was bothersome to the young man.His coach advised him to see his doctor about the lesion.Upon visiting his physician, a scraping of the affected area was collected and placed in a drop of KOH, then examined under the microscope, revealing slender fungal hyphae.A culture was inoculated, which grew a spreading flat fuzzy colony after 10 days of incubation at 30°C.Microscopic examination of the culture demonstrated the presence of both macroconidia and microconidia.
What is the most likely diagnosis?

Question

Quizplus · Accepted Answer

The description of a lesion with a pink scaly rough center and raised edge, along with the presence of fungal hyphae and the growth of a spreading flat fuzzy colony with both macroconidia and microconidia on culture, is consistent with the diagnosis of dermatophytosis (also known as ringworm or tinea).

Ben, a 17-Year-Old Wrestler, Developed a Lesion on His Upper