From the Division of Nuclear Medicine, São Paulo Cancer Institute (ICESP), São Paulo, Brasil.
Clin Nucl Med. 2018 Aug;43(8):623-624. doi: 10.1097/RLU.0000000000002163.
We report a case of a medullary thyroid carcinoma noncalcified brain metastasis characterized on Ga-dotatate PET/CT but not on an F-fluoride PET/CT performed 1 month later. Subsequent F-fluoride PET/CT studies performed 7 and 19 months after the Ga-dotatate PET/CT study demonstrated focal uptake in the metastasis. The CT images of the last PET/CT study also depicted a small focus of calcification beginning in the metastatic site.
我们报告了一例不伴有钙化的甲状腺髓样癌脑转移病例，该病例在 Ga- DOTATATE PET/CT 上有特征性表现，但在随后 1 个月进行的 F-氟化物 PET/CT 上未见异常。在 Ga-DOTATATE PET/CT 检查后 7 个月和 19 个月进行的后续 F-氟化物 PET/CT 研究显示转移部位有局灶性摄取。最后一次 PET/CT 研究的 CT 图像还显示转移部位开始出现小的钙化灶。
