Breast Cancer Incidentally Detected by 18F-Choline PET/CT in a Patient With Recurrent Prostate Carcinoma.

A 79-year-old man underwent F-choline PET/CT for biochemical recurrence of prostate cancer. PET/CT images showed an area of elevated radiopharmaceutical uptake in a left pelvic node. In addition, a small focus of increased radiolabeled choline accumulation was seen in a small nodule of the right breast, which was later histologically characterized as an infiltrating ductal carcinoma. In this patient, choline PET/CT was critical in localizing prostate cancer recurrence and identifying a second unsuspected malignancy.