原发性十二指肠平滑肌肉瘤甚为少见,我院自1975年开院以来,仅见此一例,现报导如下:男性患者,57岁,入院主诉,右下腹包块三个月,逐渐增大,但无其他明显不适,仅进食后有饱胀感,有便秘及溃疡病(65年在他院钡餐证实)出血史。体检:右上腹部 Primary duodenal leiomyosarcoma is very rare. Our hospital has only seen this case since it was opened in 1975. It is reported as follows: Male patient, 57 years old, admitted to hospital, and his right lower abdomen was massed for three months and gradually increased. However, there was no other significant discomfort, only a feeling of fullness after eating, constipation and ulceration (confirmed by barium meal in his hospital in 65 years). Physical examination: right upper abdomen