Fig. 3.

Serial Ga-68-PSMA-PET/CT in a 67-year-old man with BCR following radical prostatectomy and prostatectomy bed radiotherapy. a Initial scan at PSA 0.1 ng/ml. Left internal iliac lymph node (arrow) considered benign, morphologically (< 4 mm diameter) and metabolically (SUV 1.2). b PSA rise to 0.2 ng/ml, follow-up scan after 4 months. Minimal enlargement of the lymph node, still within normal limits (SUV 0.7; PSA). c Further PSA rise to 0.4 ng/ml, follow up scan 5 months after b. Lymph node remains subcentimetre (6 mm), but due to high PSMA uptake (SUVmax 8.2), now considered suspicious for malignant metastasis