Pincer Nail Deformity

Image and content excerpted from the VisualDx clinical decision support system.


Image of Pincer Nail Deformity

VisualDx images show variation in age, skin color, and disease stage. VisualDx has 14 images of Pincer Nail Deformity.

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ICD Codes

ICD-9-CM:
703.8 – Other specified diseases of nail

ICD-10-CM:
L60.8 – Other nail disorders

Synopsis

Pincer nail is characterized by transverse over-curvature of the nail plate that increases along the longitudinal axis of the nail and progressively pinches the nail bed distally. The curvature commonly increases from proximal to distal, giving rise to a triangular shape when seen from above.

The condition occurs frequently on the toes but only rarely on the fingers. Pain is a common complaint and can be intense. In time, the lateral nail plate edges dig into the lateral grooves and progressively pinch the nail bed. Ultimately, the lateral borders of the nail plate join together leading to the so-called trumpet-nail.

Pincer nail deformity is caused by a developmental anomaly that can be inherited or acquired. Acquired cases may be caused by osteoarthritis, ill-fitting shoes, subungual tumors, psoriasis, onychomycosis, arteriovenous fistula of the forearm, Kawasaki disease, and paraneoplastic sign.

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