Mycetoma-like granuloma in a cat caused by Microsporum canis

A solitary subcutaneous nodule from a Persian cat consisted of coalescing mycetoma-like granulomas containing abnormal hyphae of Microsporum canis. Overlying hair follicles were heavily laden with dermatophytes but had little associated perifollicular inflammation. The complex classification of dermatophyte-induced dermal inflammatory lesions is reviewed.