Unusual presentation of onychomycosis caused by Exophiala ( Wangiella) dermatitidis.

The article presents a case study of a healthy 42-year-old man who was diagnosed with onychomycosis. It states that a linear longitudianal ridging with yellowish pigmentation was observed in the patient's right great toe nail despite of having good health and no medical history of trauma or nail abnormalities. Furthermore, the patient was diagnosed with onychomycosis due to Exophiala dermatidis based on morphological tests.