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目的:探讨大肠腺癌肝转移瘤的CT表现。材料与方法:搜集原发病灶经手术病理证实的大肠腺癌发现有肝转移的病人49例(直肠腺癌23例,结肠腺癌26例),其中14例肝转移灶经病理证实。结果:大肠腺癌肝转移瘤CT表现特点:(1)多为大小不等的圆形或不规则形低密度病变,平扫CT值多在30Hu以下,增强扫描轻中度强化;(2)中心性更低密度区CT表现为瞳孔征、厚环征、薄环征或不规则形,较具特征;(3)特殊表现:巨块病灶、高密度、钙化等。结论:大肠腺癌转移瘤有一定的特征性,可借此与原发性肝癌、肝脓肿等鉴别。
Objective: To investigate the CT findings of hepatocellular carcinoma in colorectal adenocarcinoma. MATERIALS AND METHODS: Forty-nine patients with colorectal adenocarcinoma (23 with rectal adenocarcinoma and 26 with colonic adenocarcinoma) were collected from colorectal adenocarcinoma confirmed by pathology. 14 cases of liver metastases were confirmed by pathology. Results: CT features of hepatic metastases in colorectal adenocarcinoma: (1) Most of them were round or irregular low-density lesions of different sizes. CT values were mostly below 30 Huv in enhanced scanning with mild to moderate enhancement; (2) Central lower density CT showed pupil sign, thick ring sign, thin ring sign or irregular shape, more features; (3) special performance: massive lesions, high density, calcification and so on. Conclusion: Colorectal adenocarcinoma metastases have certain characteristics, which can be used to identify with primary liver cancer, liver abscess and so on.