
Melanoma acrolentiginous C43.7 / C43.7
DD: Melanoma malignant acrolentiginous melanoma; here: complicating onychomycosiswith bleeding after banal trauma.

Onychomycosis (overview) B35.1
tinea unguium: black dyschromia of the nail plate localized at the left big toe of a 52-year-old man, increasing for more than one year. border zone to the healthy nail plate marked proximally by a horizontal arrow. cuticle not discolored (vertical arrows: speaks against a melanocytic tumor). nail plate itself is discolored (see anterior incision margin marked by a star). Trichophyton rubrum and Aspergillus spp. have been culturally proven.

Nail diseases (overview) L60.8
Nail hematoma: sharply limited brown discoloration of the nail matrix; no longitudinal striations