大肠腺癌肝转移瘤的CT探讨

CT Manifestations of Hepatic Metastases from Adenocarcinoma of Large Intestine

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。

Purpose: To assess the CT manifestations of hepatic metastases of the- large intesti-nal adenocarcimoma. Materials and Methods: I lepatic metastases of adenocaremoma of large intestine were oberserved in 49 cases, in which 26 cases oviginated from the colon and 23 from the rectum, and 14 cases ol hepatic metastases were operatively and pathologically confirmed. Results: The CT manifestations of hepatic metastases included: (1) round and irregular hypodense lesions in different size and mild or moderately enhanced after the administration of contrast medium: (2) the central area ol the lesions with hypodensity, presenting the characte-ristic signs resembling thick-rim and pupil, or having irregular pattem: (3) particular manifestations: giant mass lesions, hyperdense lesions and calcification. Conclusion: The characteristic CT manifestations of hepatic metastases of adenocarcinoma of large intestine were very helpful in differentiating it from primary hepaloma and liver abscess.