髓性脂肪瘤是由脂肪和髓样造血成分组成的良性肿瘤。临床少见,通常发生在肾上腺皮质或髓质内,腺外罕见。我们在外检中遇到1例,现报告如下: 患者女,62岁,因转移性右下腹痛14小时,以“急性阑尾炎”入院急诊手术。术中见:阑尾腹膜后位,充血水肿,回盲部肠系膜内见有蚕豆大肿块,似肿大的淋巴结。切除阑尾同时摘除肠系膜肿块送病理检查。病检:灰红肿块一个2.6×2.2×1.5cm,包膜完整,切面暗红、小区淡黄色。镜检:肿瘤由成熟脂肪细胞及骨髓造血细胞组成,两者分布比例不均。在脂肪细胞间可见多少不等的原始或不同成熟度的红 Myeloma is a benign tumor composed of fat and myeloid hematopoietic components. It is rarely seen clinically and usually occurs in the adrenal cortex or medulla and is rarely seen outside the gland. We encountered one case in the external examination and the report is as follows: The patient female, 62 years old, was admitted to the hospital with emergency treatment for acute appendicitis because of metastatic right lower quadrant pain for 14 hours. During the operation, the retroperitoneum of the appendix was congested and edema, and a large mass of faba bean was seen in the mesentery of the ileocecum, which seemed to be an enlarged lymph node. The appendix was removed and the mesenteric mass was removed for pathological examination. Disease examination: a gray mass of 2.6 × 2.2 × 1.5cm, complete envelope, cut dark red, light yellow community. Microscopic examination: The tumor consists of mature adipocytes and bone marrow hematopoietic cells, and the distribution of the two is uneven. How many different raw or different maturity levels of red can be seen between adipocytes