Fibrous crescent

What it means

A type of glomerular crescent characterized by extracapillary fibrosis composed of greater than 75% matrix and of less than 25% cells with or without fibrin, usually associated with disruption of Bowman's capsule and involving over 10% of the capsular circumference.

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