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Continue to ChatA rare case of primary leiomyosarcoma of the sigmoid colon & urothelial carcinoma of the bladder in a Crohn's patient https://www.sages.org/meetings/annual-meeting/abstracts-archive/a-rare-case-of-primary-leiomyosarcoma-of-the-sigmoid-colon-and-urothelial-carcinoma-of-the-bladder-in-a-crohns-patient/