Figure 2.

Schematic presentation of architectural subtypes of hepatocellular carcinoma originally described by the Liver Cancer Study Group of Japan.

Notes: (A) pure trabecular type; (B) trabecular type with small acinar structure; (C) trabecular type with large acinar structure; (D) trabecular type with pseudoglandular structure; (E) pseudoglandular type; (F) compact type; and (G) scirrhous type. Percentage of tumor plate completion and tumor sinusoid number increases in the direction of the arrow, along with the degree of histological differentiation. Copyright ©1991. Bunkodo Co. Ltd. Reproduced from Okudaira M. II kansaibougan 2. soshiki bunrui [Hepatocellular carcinoma 2. Histological classification]. In: Okudaira M, Mizumoto R, Tanigawa H, editors. Toriatsukai kiyaku ni sotta shuyou kanbetsu shindan atlas kanzou. Tokyo: Bunkodo; 1991:22–27. Japanese.17