DD: Melanoma malignes acrolentiginous: here: complicating onychomycosis with bleeding due to mold infestation; the inlet points proximally, a normally colored nail area; no Hutchinson phenomenon.
Melanonychia striata longitudinalis (detailed picture): approx. 0.4 cm wide, dark brown strip of the nail; nail fold with distinct paraungual rim; especially malignant melanoma of the nail root.
Striped black coloration of the big toe nail. The finding is unchanged since > 1 year. Here striped onychomycosis due to mold infestation of the nail. Diagnostic evidence is the normally colored proximal stripe above the nail dyschromia (see explanatory figure and reflected light microscopy).
psoriasis of the nails. severe onychodystrophy with wave-like transverse ligament with simultaneous psoriatic attack of the nail wall (paronychium). missing eponychium (cuticle). partially crumbly nail matrix on the nail surface as well as on the distal edge. no pain symptoms.
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