From the Departments of *Radiology, †Nuclear Medicine, MUHC, McGill University, Montreal, Quebec, Canada; ‡Medical Imaging, King Abdulaziz Medical City, Kingdom of Saudi Arabia; and §Pathology, MUHC, McGill University, Montreal, Quebec, Canada.
Clin Nucl Med. 2015 Apr;40(4):e245-50. doi: 10.1097/RLU.0000000000000635.
It is extremely rare for rectal tumors to metastasize to the penis, and when it occurs, it is associated with poor prognosis. The appearance of penile metastasis from rectal primary tumor on PET imaging has not been widely reported. We report a case of a 70-year-old man with previous history of treated stage III adenocarcinoma of the rectum 26 months ago. The restaging 18F-FDG PET/CT scan demonstrated a hypermetabolic mass at the base of his penile shaft. This lesion was confirmed on core biopsy to be a metastatic adenocarcinoma of colorectal origin consistent with the known primary rectal tumor.
直肠肿瘤转移至阴茎极为罕见，而当发生转移时，预后通常较差。直肠原发肿瘤在 PET 成像上出现阴茎转移的情况尚未得到广泛报道。我们报告了 1 例 70 岁男性，26 个月前患有 III 期直肠腺癌，经治疗后病情得到缓解。18F-FDG PET/CT 扫描显示其阴茎根部有一处高代谢肿块。该病灶经核心活检证实为转移性结直肠腺癌，与已知的直肠原发肿瘤一致。
