active colitis

Focal active colitis

Focal active colitis is a pattern of tissue injury associated with inflammation in the colon. “Focal” means that the changes are only seen in parts of the tissue examined. “Active” means that the tissue injury and inflammation are ongoing or of recent onset. The changes seen in this condition are usually mild and the surrounding …
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Crypt abscess

A crypt abscess is a collection of specialized immune cells called neutrophils inside the colon. It is an example of acute inflammation and is often seen in a condition called active colitis. What does this look like under the microscope? The inside of the colon is covered by epithelial cells that connect to form structures …
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