Clin Nucl Med. 2018 Jan;43(1):60-61. doi: 10.1097/RLU.0000000000001902.
A 62-year-old man with recently diagnosed prostatic adenocarcinoma was referred for a whole-body Ga-prostate-specific membrane antigen (PSMA) PET/CT scan for staging. Although the scan did not reveal metastatic disease, it did reveal a PSMA-avid lesion in the upper abdomen located between the liver and the stomach. Histopathologic examination demonstrated a gastrointestinal stromal tumor. The lesion demonstrated increased uptake in the margins of the tumor with a central photopenic area, which we consider to be the typical pattern on PSMA images of a gastrointestinal stromal tumor, based on theoretical PSMA distribution in such a tumor and other reported cases.
一位 62 岁男性，近期诊断为前列腺腺癌，为进行分期进行全身 Ga-前列腺特异性膜抗原（PSMA）PET/CT 扫描。虽然扫描未发现转移病灶，但确实在肝脏和胃之间的上腹部发现一个 PSMA 阳性病灶。组织病理学检查显示胃肠道间质瘤。病变在肿瘤边缘摄取增加，中央出现透光区，我们认为这是胃肠道间质瘤 PSMA 图像的典型模式，基于该肿瘤中 PSMA 的理论分布和其他报道的病例。
