Figure 3:

Onychomycoses

a) Distal-lateral subungual onychomycosis due to T. rubrum in a 79-year-old man

b) Onychomycosis of the big toenail in the same patient, with lateral white streaks. There is visible subungual hyperkeratosis of the markedly thickened nail plate, which is no longer transparent and manifests a yellowish-brown discoloration

c) White superficial onychomycosis (leuconychia trichophytica) in a 41-year-old man

d) Total dystrophic onychomycosis of the fingernails due to C. albicans and Aspergillus niger in an 88-year-old man