Onychogryphosis

What it means

Onychogryphosis is a disorder of nail plate growth that is clinically characterized by an opaque, yellow-brown thickening of the nail plate with associated gross hyperkeratosis, elongation, and increased curvature.

There is a build up of keratin causing the nail plate to lift away from the nail bed. The thickened nail plate is usually very hard. Onychauxis and onychogryposis are dystrophic diseases of the nail in which the nail plate becomes decidedly hypertrophied. The differentiation of the two entities is only one of degree of severity. The spelling onychogryposis is occasionally used but it is not correct.

Rare diseases that can present with this9

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Dystrophic thickened nails · Onychogryposis · Thickened nails