Fig. 4.
Potential effect of bicalutamide on 68Ga-PSMA-11 PET-uptake. On initial PET/CT (a, red arrow) moderately increased tracer accumulation with a SUVmax of 4.47 in a LN (5.7 mm in diameter) was found in the region of the left internal iliac vessels as shown on axial fused PET/CT-images. On follow-up PET/CT performed 7 days after initiation of bicalutamide (160 mg/day; 1 week), no pathologic tracer accumulation was found in the left iliac LN, which morphologically remained unchanged (b; yellow arrow). PSA decreased from 0.94 to 0.18 ng/ml under treatment with bicalutamide