⁶⁸Ga-PSMA-11 PET/CT and ⁶⁴CuCl₂ PET/CT Help in Identifying Rare Metastatic Site of Penile Shaft in a Patient of Carcinoma Prostate

A 71-year-old man, presenting with complaints of burning sensation and pain during urination, finally diagnosed with prostate carcinoma. Ultrasonography of the abdomen and pelvis revealed prostatomegaly. Serum PSA level was elevated, and TRUS-guided biopsy demonstrated acinar adenocarcinoma (Gleason score: 5 + 4 = 9). Ga-68-PSMA-11 PET/CT for initial staging showed PSMA-avid enlarged prostate, pelvic lymphadenopathy, and focal PSMA uptake in the left side of the shaft of the penis. The patient also underwent a (64)CuCl2 PET/CT, which demonstrated similar findings of enlarged prostate and adenopathy with focally increased tracer uptake in the shaft of the penis coinciding with the lesion observed on Ga-68-PSMA-11 PET/CT, thereby detecting a rare metastatic site from carcinoma prostate.