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| Gross = | | Gross = | ||
| Grossing = | | Grossing = | ||
| Site = [[colon]] | | Site = [[colon]], [[rectum]] | ||
| Assdx = autoimmune diseases ([[celiac disease]], [[diabetes mellitus]], [[thyroid]] disorders, [[arthritis]]) | | Assdx = autoimmune diseases ([[celiac disease]], [[diabetes mellitus]], [[thyroid]] disorders, [[arthritis]]) | ||
| Syndromes = | | Syndromes = | ||
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Notes: | Notes: | ||
*Clinical DDx includes [[irritable bowel syndrome]] - which has no or subtle histopathologic changes. | *Clinical DDx includes [[irritable bowel syndrome]] - which has no or subtle histopathologic changes. | ||
*This pathology also afflicits rectum; however, it is less commonly found there. | |||
**Rectum is afflicted in approximately in 65% of cases.<ref name=pmid12018911>{{cite journal |author=Agnarsdottir M, Gunnlaugsson O, Orvar KB, ''et al.'' |title=Collagenous and lymphocytic colitis in Iceland |journal=Dig. Dis. Sci. |volume=47 |issue=5 |pages=1122–8 |year=2002 |month=May |pmid=12018911 |doi= |url=}}</ref> | |||
===Epidemiology=== | ===Epidemiology=== |
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