多原发性恶性肿瘤在国内报道不多。现报道一例如下:某患男22岁住院号210048 因左颌下长肿物19年于1982年11月29日入本院。1983年1月13日在全麻下行肿瘤摘除术,术后1年无复发。理病检查;肿块约8×5×4Cm 大小,包膜完整,切面呈灰红而细腻、质硬。镜下:肿瘤富有细胞,并侵及部分包膜,瘤细胞大小不一,呈梭形、椭圆形或多角形,胞浆丰富。核呈杆状,两端钝圆,异形明显,有核分裂相。瘤细胞呈束状或编织排列。肿瘤富有血管,血管内皮 Many primary malignant tumors have not been reported in China. One case is reported as follows: A man with a 22-year-old hospital number 210048 was admitted to the hospital on November 29, 1982 due to a 19-year old submandibular mass. On January 13, 1983, tumor removal was performed under general anesthesia. There was no recurrence after 1 year. Disease examination; mass about 8 × 5 × 4Cm size, complete envelope, cut surface was gray and delicate, hard. Microscopically, the tumor is rich in cells and invades part of the capsule. The tumor cells are of different sizes and are spindle-shaped, oval-shaped, or polygonal. The cytoplasm is abundant. The nucleus is rod-shaped, blunt at both ends, distinctly shaped, and has a karyophase. The tumor cells are arranged in bundles or braids. The tumor is rich in blood vessels, vascular endothelium