The Authors studied 369 abdominal CT scans performed during past 10 months in Kyung Hee University Hospital. Of these 369 cases, 56 cases were found to have diseased lymph nodes. 1. Of 56 cases, 47 cases(84%) were proved to be metastasis. The remainder was 1 case of primary lymphoma and 8 cases of unknown pathology. 2. The frequent site of lymph node involvement was paraaortic nodes (31/56 cases, 55%) and retrocrural prevertebral nodes(25/56 cases, 44%). 3. It is our belief that the CT scan is the most reliable and accurate mean in the diagnosis of diseased abdominal nodes. The surrounding and obscuring of abdominal aorta and/or inferior vena cava, obscuring of retrocrural findings of diseased nodes. But the isolated enlarged nodes were not infrequent. 4. It is also a greate advantage of CT scan that primary lesion, bone metastasis, hydronephrosis. biliary duct dilation and gall bladder dilatation could be detected in same CT scan.