Summary
We report on a case of collagenous gastroduodenitis with concomitant collagenous colitis
in a 75-year-old woman with watery diarrhea of approximately six months' standing.
The step biopsy material obtained from the colon revealed continuous collagenous colitis
with thickening of the basal membrane to 30 µm. The biopsies taken from the stomach
and duodenum also revealed a band-like deposition of collagen in the duodenum (bulb
and proximal portion of the descending portion) along the basal membrane of the lining
epithelium, associated with partial atrophy of the villi. In the stomach, this band
of collagen was located, parallel to the mucosal surface, at the level of the floor
of the foveolae.
Key words:
Collagenous colitis - Collagenous duodenitis - Collagenous gastritis
