梭形细胞肉瘤是一种发病率较低的恶性肿瘤。它们可以发生在软组织、骨骼或内脏中。梭形细胞肉瘤的形态、密度和代谢特征与病变部位有关。一名 61 岁女性在进食两周后出现呕吐。涉及腹膜刺激症状，但对症治疗（包括止吐和解痉治疗）没有反应。腹部计算机断层扫描（CT）显示盆腔肠道内有肿块。然后进行18F-氟脱氧葡萄糖（18F-FDG）正电子发射断层扫描/CT，有趣的是发现左上腹有一个空肠恶性肿瘤肿块，18F-FDG环形高摄取，并发肠套叠和肠梗阻。最后，空肠肿块经病理证实为未分化梭形细胞肉瘤。版权所有© 2024 作者。由 Galenos 出版社代表土耳其核医学学会出版。

Spindle cell sarcoma is a malignant tumor with low incidence. They can occur in the soft tissue, bone, or viscera. The characteristics of morphology, density, and metabolism of spindle cell sarcoma are related to the location of the lesion. A 61-year-old woman presented with vomiting after eating for 2 weeks. Signs of peritoneal irritation were involved, but no response for symptomatic treatment included antiemetic and antispasmodic therapy. Abdominal computed tomography (CT) indicated a mass in the intestinal tract in the pelvic cavity. Then, 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/CT was performed, which interestingly detected a jejunal malignancy mass in the left upper abdomen with annular high uptake of 18F-FDG, which was complicated by intussusception and intestinal obstruction. Finally, the jejunal mass was pathologically clarified as an undifferentiated spindle cell sarcoma.Copyright© 2024 The Author. Published by Galenos Publishing House on behalf of the Turkish Society of Nuclear Medicine.