目的　探讨腹膜腔转移瘤的CT特征。方法　分析 48例经病理证实的腹膜转移瘤的CT表现。结果　①腹水 3 2例 ,占66.7%。②网膜改变 16例 ,占 3 3 .3 %;其中网膜饼征 8例 ,网膜结节 5例 ,网膜囊性变 2例 ,网膜混浊 1例。③系膜改变 14例 ,占 2 9.2 %。④壁层腹膜增厚 12例 ,占 2 5 %。⑤小肠壁增厚伴肠管移位 2例 ,占 4.2 %。结论　CT是诊断腹膜转移瘤的有效方法 Objective To investigate CT features of peritoneal metastases. Methods CT findings of 48 cases of peritoneal metastases confirmed by pathology were analyzed. Results ① 32 cases of ascites, accounting for 66.7%. ② There were 16 cases of omental changes, accounting for 33.3%. Among them, 8 cases of omental cake, 5 cases of omental nodules, 2 cases of omental cystic degeneration and 1 case of omental opacification. ③ mesangial changes in 14 cases, accounting for 2 9.2%. ④ parietal peritoneal thickening in 12 cases, accounting for 25%. ⑤ intestinal wall thickening with bowel shift in 2 cases, 4.2%. Conclusion CT is an effective method for the diagnosis of peritoneal metastases