目的：对原发性结节型肝癌常见与少见计算机断层扫描图像(computed tomography,CT)特征进行对比分析，归纳出肝癌的少见征象类型，以提高对此类疾病的诊断与鉴别诊断水平。材料与方法：选取61例病理诊断为肝细胞肝癌的病例，分析其常规CT检查结果、经动脉造影CT（CT hepatic arteriography, CTA）及动门脉造影CT (CT hepatic arterial portography, CTAP)检查结果。结果：肝内共发现病灶61个。30例结节型肝癌呈典型表现，CT平扫呈低密度，动脉期见不均匀强化，门脉期呈低密度表现。另31例呈结节型肝癌的少见表现，其中7例动脉期、门脉期扫描密度均高于肝实质；3例CT平扫病灶为低密度，周围可见“包膜样”结构，动脉期病灶强化不均匀，门脉期呈等密度；8例CT平扫呈低密度，其中5例动脉期中央部结节性强化，另3例动脉期肿瘤周边见不规则环形强化，门脉期密度均降低；10例平扫、动脉期及门脉期均表现为低密度病灶；3例患者常规CT检查肝内未发现病变，CTA检查见病变呈高密度，CTAP检查呈低密度。结论：结节型肝癌存在常见表现和多种少见CT表现类型，应结合其临床资料、CTA、CTAP检查，并与肝内其他常见占位性病变加以区别。 OBJECTIVE: To compare the characteristics of common nodular hepatocellular carcinoma (HCC) with rare computed tomography (CT) features and to summarize the types of rare signs of HCC in order to improve the diagnosis and differential diagnosis of these diseases. Materials and Methods: A total of 61 cases with pathological diagnosis of hepatocellular carcinoma were selected. The results of routine CT examination, CT hepatic arteriography (CTA) and CT hepatic arterial portography (CTAP) were analyzed. . Results: A total of 61 lesions were found in the liver. Thirty cases of nodular liver cancer showed typical manifestations. CT plain scan showed low density, arterial phase showed uneven enhancement, and portal vein showed low density. The other 31 cases showed nodular liver cancer, 7 of them had higher scanning density in the arterial phase and portal phase than the liver parenchyma, and 3 CT scan lesions had low density, surrounded by a capsule-like structure. The lesions were unevenly intensified and showed equal density in the portal venous phase; 8 CT scans showed low density, 5 of them had nodular enhancement in the middle of the arterial phase, and the other 3 patients had irregular annular enhancement around the arterial phase, and portal vein density. All cases were decreased; 10 cases of plain scan, arterial phase and portal vein showed low-density lesions; 3 patients had no lesions detected by routine CT examination of the liver, CTA examination showed high-density lesions, CTAP examination showed low density. Conclusion: There are common manifestations and multiple types of rare CT appearances of nodular liver cancer, which should be combined with clinical data, CTA, CTAP examination, and be distinguished from other common space-occupying lesions in the liver.