# Casal collar

> English word · Noun

## Definitions
1. The presence of an erythematous pigmented skin rash in the distribution of a broad collar, seen in patients with pellagra as a result of niacin deficiency.

## Etymology
Named after Gaspar Casal, who first described pellagra.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/casal-collar