II. Non-epithelial Benign Tumors of the Large Bowel in Consecutively Autopsied 1, 130 Cases

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Abstract
Non-epithelial tumors of the large bowel causing manifest clinical symptoms have been sporadically reported in surgical literatures, on the contrary, scarecely any systemic autopsy studies on these lesions have been done, especially in our country.The authors have studied 1, 130 cases, consecutively autopsied in Tokyo Metropolitan Geriatric Hospital, putting stresses upon non-epithelial benign tumors of the large bowel.1) 50 cases in total were observed. They were all small and trivial to be responsible for the cases of any patient's death.2) Lipomas were the most common non-epithelial tumor, 35 cases out of 1, 130 cases (3.1%) bearing 45 lipomas in total. All lipomas were in the submucosa, measuring less than 2cm in diameter. In 6 cases, the lesion was multiple, 2 to 5 in number.3) Other lesions were polypoid lymphangiectasis (6), leiomyoma (5), hemangioma (2) and fibroma (2).4) Problems of benign lymphoid polyp and lipohyperplasia of the ileocecal valve were also discussed.

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