median nail dystrophy

median nail dystrophy

A nail disorder characterised by a paramedian canal or split in the nail plate of one or more nails. Small cracks or fissures extend laterally from the central canal or split toward the nail edge, resulting in an appearance likened to that of an inverted Christmas tree. The condition is usually symmetrical and most often affects the thumbs.

Aetiology
Usually idiopathic; some cases have been linked to trauma, the use of PDAs (personal digital assistants) and isotretinoin.

Management
Tacronimus.
References in periodicals archive ?
Biting, pulling, or improper cutting of the cuticle over time can cause long-term damage to the nail plate, such as ridging of the nail, median nail dystrophy, or permanent destruction of the nail plate.
The differential diagnosis of external nail deformation includes median nail dystrophy, chronic proximal nail fold inflammation, onychomycosis, psoriasis, Beau's lines, and habit-tic-like dystrophy.
The etiology of this disorder is unknown, although some have suggested that habit-tic deformity and median nail dystrophy are different manifestations of the same disorder.