Fig. 2
Patient 5. A 68-year-old patient with PCa treated with radiotherapy and complete androgen blockade with current elements of biochemical relapse (PSA level 2.33 ng/ml), scanned with 11C-Choline (a) and with 68Ga-PSMA (b).Several metastases are demonstrated only by means of 68Ga-PSMA alone (red arrows). Yellow arrows show a metastatic retroperitoneal lymph node and a local relapse in 68Ga-PSMA PET/CT, while 11C-Choline PET/CT showed no suspicious lesion in these areas