International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01
Collagenous colitis is characterised by chronic watery diarrhoea, normal radiological and endoscopic appearance of the colon, and a specific histopathological feature consisting in the presence of a subepithelial collagen band (10 mm or more) adjacent to the basal membrane, together with epithelial lymphocyte infiltration and chronic inflammation of the lamina propria.
postcoordination
Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Specific anatomy - multiple selections are allowed
Has manifestation - multiple selections are allowed
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