原发性大网膜恶性肿瘤在临床上较为少见,我院自1973年～1982年间经手术和病理证实有3例,现报告如下: 例1.男,15岁。1972年10月发现脐下有拳头大小腹块,4个月来肿块明显增大,餐后腹部饱胀,消瘦入院。体检:腹部膨 Primary omental malignant tumors are rare in clinical practice. Our hospital has been confirmed by surgery and pathology from 1973 to 1982. There are three cases. The current report is as follows: Example 1. Male, 15 years old. In October 1972, it was found that there was a fistula of the size of the fist below the umbilicus, and the mass was significantly increased in 4 months. After the meal, the abdomen was full and the patient was thin and admitted to the hospital. Physical examination: abdominal swelling