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6例人肺周围性孤立结节型细支气管肺泡细胞癌,切除术后立即经常规光学石蜡切片,电镜超薄切片。结果:癌细胞核大,位于细胞中央或基底,核膜凹陷,有分叶核或双核,核仁粗大,癌细胞高柱状、椭园或立方形,围成腺腔。细胞顶端紧密联结,侧面以少数小桥粒相连。部分癌细胞顶部呈园屋顶、舌状或蘑菇状突向腺腔。表面有微绒毛。胞浆内线粒体丰富,有高尔基复合体,丰富的核糖体和平行排列的粗面内质网。6例胞浆内均有分泌颗粒;(1)3例见多量,大小不等、有界膜的园形均质电子致密颗粒散在、成簇或成片位于核上方,
Six cases of isolated pulmonary nodular bronchioloalveolar cell carcinoma of the lung were removed by routine optical paraffin sections and ultrathin sectioned by electron microscopy. RESULTS: The nucleus of the cancer cells was large, located in the center of the cell or in the basement, with nuclear membrane depression, lobular nucleus or binucleate, and large nucleoli. The cancer cells had high columnar, elliptical or cuboidal shapes and surrounded the glandular cavities. The top of the cells is tightly connected and the sides are connected by a few small desmosomes. Part of the top of the cancer cell is a roof, tongue or mushroom protruding to the gland cavity. Microvilli on the surface. The cytoplasm is rich in mitochondria, with a Golgi complex, abundant ribosomes, and a rough array of endoplasmic reticulum. 6 cases had secretory granules in the cytoplasm; (1) 3 cases saw a large number of uniform and dense electron-dense particles in the shape of bounded membranes, scattered in clusters or in a piece over the nucleus.