# Russell body

> English word · Noun

## Definitions
1. A PAS+, eosinophilic, cytoplasmic immunoglobulin-containing inclusion consisting of distended endoplasmic reticulum, usually found in abnormal plasma cells.

## Etymology
Named for William Russell (1852-1940), a Scottish physician.

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