本文报道21例心房粘液瘤的病理形态学观察结果,其中包括7例的超微结构改变。患者年龄14～59岁。19例肿瘤位于左心房,1例位于右心房,另1例恶性者病变累及左右心房,并转移至胸壁。肿瘤外形多样,呈胶冻状,出血坏死常见。 光镜检查瘤细胞呈散在或条索状分布在大量粘液样基质中,肿块表面常衬有单层上皮细胞。瘤细 This article reports 21 cases of atrial myxoma pathological findings, including 7 cases of ultrastructural changes. The patient’s age is 14 to 59 years old. Nineteen tumors were located in the left atrium, one in the right atrium, and one case of malignant lesions involving the left and right atria and transferred to the chest wall. The tumors are diverse in shape and jelly-like, with common hemorrhage and necrosis. Light microscope examination showed that the tumor cells were scattered or cord-like distribution in a large number of mucin-like matrix, the tumor surface often lined with a single layer of epithelial cells. Fine tumor