Capecitabine is an oral fluoropyrimidine used as adjuvant and palliative chemotherapy in patients with colorectal cancer. Diarrhea is a well-known side effect of capecitabine and 5-fluorouracil agents. We present a case with terminal ileitis as a rare adverse event of capecitabine treatment. Capecitabine-induced terminal ileitis is likely to be underreported. It should be considered more often as a cause of severe and atypical complaints of diarrhea during treatment with capecitabine or other 5-fluorouracil agents.
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