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作者对５０例心脏粘液瘤进行免疫组织化学观察，结果显示，５０例粘液瘤中波形蛋白（ｖｉｍｅｎｔｉｎ）为阳性；平滑肌特异性肌动蛋白（ａｃｔｉｎ）及第八因子相关抗原（Ⅷ）为阴性。２例伴腺样结构者上皮细胞膜抗原（ＥＭＡ）为阳性。１０例电镜观察肿瘤内基质丰富，细胞内粗面内质网丰富，其内可含有与基质成分相似的絮状或细颗粒状物质。提示粘液瘤细胞有合成基质的能力
The authors performed immunohistochemical examination of 50 cases of cardiac myxoma. The results showed that vimentin was positive in 50 cases of myxoma and negative for smooth muscle-specific actin (actin) and factor VIII related antigen (VIII). Two cases with adenoid structure were positive for epithelial membrane antigen (EMA). In 10 cases of electron microscopic observation of tumor-rich matrix, intracellular rough endoplasmic reticulum is abundant, which can contain floc-like or fine-grained substances similar to the matrix components. Tips for the ability of myxoma cells to synthesize matrices