Upcoming Role of Prostate Specific Membrane Antigen Positron Emission Tomography-Computed Tomography in Detecting Occult Metastases in Prostate Cancer.

Prostate cancer (PCa) is the second most frequent malignancy in men. Most common sites of disease involvement other than the prostate gland include abdominopelvic lymph nodes and the skeleton. The detection of nodal metastases is of utmost importance to determine prognosis and choice of treatment in patients with PCa. Conventional imaging focuses on morphologic information and takes size criteria for decision-making. Early detection of metastases is further relevant in terms of prognosis and therapy management. Molecular imaging of PCa with Ga-68 prostate-specific membrane antigen (PSMA) positron emission tomography-computed tomography (PET-CT) has recently received significant attention and frequently used with a signature to PCa-specific remark. We presented the case of a 69-year-old male presenting with biochemical recurrence after undergoing surgery and in remission for about a year, where Ga-68 PSMA PET-CT identified additional sites of disease apart from the expected regional bed.