Interesting Images68Ga-FAPI PET/CT Detects Gastric Signet-Ring Cell Carcinoma in a Patient Previously Treated for Prostate CancerPang, Yizhen MD∗; Huang, Haichao MD, PhD†; Fu, Li MD‡; Zhao, Liang MD§; Chen, Haojun MD, PhD∗Author Information From the ∗Department of Nuclear Medicine and Minnan PET Center, Xiamen Cancer Hospital Departments of †Urology ‡Pathology, The First Affiliated Hospital of Xiamen University Department of §Radiation Oncology, Xiamen Cancer Hospital, The First Affiliated Hospital of Xiamen University, Teaching Hospital of Fujian Medical University, Xiamen, China. Received for publication February 7, 2020; revision accepted April 3, 2020. Conflicts of interest and sources of funding: none declared. Correspondence to: Haojun Chen, MD, PhD, Department of Nuclear Medicine and Minnan PET Center, The First Affiliated Hospital of Xiamen University, 55 Zhenhai Rd, Xiamen 361003, China. E-mail: firstname.lastname@example.org. Clinical Nuclear Medicine: August 2020 - Volume 45 - Issue 8 - p 632-635 doi: 10.1097/RLU.0000000000003099 Buy Metrics Abstract A 75-year-old man with a history of prostate cancer (T1N0M0, Gleason score 4 + 3) was referred to radionuclide bone scan and 68Ga-PSMA PET/CT to detect recurrence. Multiple abnormal foci were observed in the axial and appendicular skeleton, which were suggestive of metastatic superscan from prostate cancer. However, histopathological examinations (from bone biopsy) did not support the metastases from prostate cancer. 68Ga-FAPI PET/CT was then performed to detect the occult tumor, which showed intense activity in the gastric wall. Subsequent gastroscopy examination revealed the diagnosis of GSRCC (gastric signet-ring cell carcinoma). The diagnosis of GSRCC with widespread bone metastases was finally made. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.