Onychomadesis

What it means

Complete shedding (separation) of the nail from the proximal matrix. Onychomadesis is the proximal separation of the nail plate from the nail matrix due to a temporary cessation of nail growth.

Onychomadesis is defined as proximal nail plate separation from the nail matrix and nail bed caused by a temporary arrest in nail matrix activity, and may present as a Beau's line.

Rare diseases that can present with this1

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