Morphological and histological features of resected hepatocellular carcinoma in cirrhotic patients in the West.

The pathological findings of 26 consecutive resections for hepatocellular carcinomas developing in cirrhotic patients were analyzed morphologically with a special interest in the presence of a capsule, vascular extension and satellite nodules. Tumor sizes varied from 2 to 11 cm. There were 20 expanding (76.9%) and six infiltrating tumors. Infiltrating tumors were significantly larger than expanding tumors (p less than 0.01). Histologically, the most common subgroups were the trabeculated pattern (65.4%) and the Edmonson-Steiner Type II (53.9%). Of the 20 expanding tumors, only six had direct spread in the liver parenchyma adjacent to the tumor (p less than 0.02). There was a significant relationship between the presence of a tumor extension in the distal portal branches and the presence of satellite nodules around the tumor (p less than 0.01). Survival at 6 months was significantly lower in patients with infiltrating (16.7%) than in those with expanding tumors (75%), (p less than 0.05). The present results indicate that pathological features of hepatocellular carcinomas in cirrhotic patients in Western countries are similar to those encountered in the East: (a) tumors are frequently encapsulated; (b) the propensity for the tumor to spread is closely related to the presence of a tumor capsule. This study suggests that a thorough preoperative search for the capsule should be made whenever resection of a hepatocellular carcinoma in a cirrhotic patient is contemplated.