Wagner Thomas, Brucher Nicolas, Julian Anne, Hitzel Anne
Nuclear Medicine Department, Purpan University Hospital, Place du Docteur Baylac, TSA 40031, 31059 Toulouse cedex 9, France.
Nucl Med Rev Cent East Eur. 2011;14(2):109-11. doi: 10.5603/nmr.2011.00025.
We report a case of a false-positive finding in FDG PET/CT following radiotracer extravasation. A 15-year-old male patient was referred for therapeutic evaluation status post-chemotherapy for a lymphoblastic lymphoma. FDG PET/CT showed discordant findings with a marked decrease in a liver/hepatic hilum uptake, disappearance of a subcutaneous left supraclavicular uptake, and appearance of intense right axillary nodal uptake. Extravasation in the right superior limb was noted. Comparison with the previous scan showed that the axillary nodes were present, measured less than 1 cm in their short axis, had not increased in size, and had a fatty hilum. We concluded that FDG uptake was caused by a migration in lymphatic vessels.
我们报告一例放射性示踪剂外渗后氟代脱氧葡萄糖正电子发射断层显像/计算机断层扫描（FDG PET/CT）出现假阳性结果的病例。一名15岁男性患者因淋巴细胞性淋巴瘤化疗后接受治疗评估。FDG PET/CT显示不一致的结果，肝脏/肝门摄取明显减少，左侧锁骨上皮下摄取消失，右侧腋窝淋巴结出现强烈摄取。右侧上肢发现外渗。与之前的扫描相比，腋窝淋巴结存在，短轴小于1厘米，大小未增加，且有脂肪性门。我们得出结论，FDG摄取是由淋巴管内迁移引起的。
