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 F-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.
Written by:
Alzayed MF, Artho G, Nahal A, Hickeson M. Are you the author?
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.
Reference: Clin Nucl Med. 2014 Dec 26. Epub ahead of print.
PubMed Abstract
PMID: 25546188