15例肝细胞癌的电镜观察——与早期人胚肝的超微结构对比分析

Electron Microscopic Observation of Hepato cellular Carcinoma in 15 Cases An Ultrastructural Comparison with Human Embryonic Liver

作者用光镜及电镜观察了１５例肝细胞癌。用电镜观察了５例早期人胚肝作对比，两者在超微结构上有相似之处，这对电镜下判断肝细胞癌，特别是肝外转移的肝细胞癌有重要意义。两者也有较多差别，如癌细胞多形性，异质性，细胞结构成分的不同步分化，以及浸润性生长特点。这给电镜下判断肿瘤的良恶性，提供了重要依据。还观察了多个单个的死亡癌细胞，这些细胞虽未见凋落小体形成，但仍属癌细胞的凋落性死亡。在肝细胞癌半数病例中见到淋巴细胞溶癌现象。

An ultrastructural comparison between 15 cases of hepatocellular carcinoma (HCC) and 5 cases of human embryonic liver (HEL) was performed. There were similaritis. Both of them are polygonal in cell shape with a central nucleus and are abundant in RER and mitochondria; both have laminating form of RER and formation of bile capillary and perisinusoid space. These are important evidences for diagnosis of a tumor originating from hepatic cells. On the other hand, obvious differences were present between HCC and HEL. Cancer cells possess certain characteristics; they are pleomorphic and heterogeneitic; the differentiation of their ultrastructural components is not synchronic, and they are invasive in growth. These enable us to suspect the malignancy of a tumor. In addition, single death cancer cells with pyknotic nucleus were seen in HCC; some of them were phagocytozed by adjacent cells. We conside these are apoptosis even no formation of apoptoic bodies was found. In the majority of HCC cases, lymphocyte mediated cancer cell lyses by both T lymphocytes and large granular lymphocytes (nature killer cell) were found.