Abstract
More than 85 % of all fungal nail infections (onychomycosis) present as distal lateral subungual onychomycosis (DLSO). Major predisposing factors are age, diabetes, and peripheral vascular disease. The general clinical presentation of DLSO is discoloration of the nail, subungual hyperkeratosis, and onycholysis. DLSO is easy to confuse with other nail dystrophies that mimic its appearance (i.e., trauma, psoriasis, lichen planus, etc.). Therefore, KOH, fungal culture, or PAS stain is necessary to confirm the diagnosis. Recurrence and reinfection are common.
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