A significant (p ≤ 0.05) correlation between SUV<sub>max</sub> in PSMA-positive liver metastases and both size (ρ<sub>Spearman</sub> = 0.57) of metastases and PSA serum level (ρ<sub>Spearman</sub> = 0.60) was found.
Eligibility included metastatic prostate cancer and at least one: small-cell neuroendocrine morphology; ≥50% neuroendocrine marker expression; new liver metastases without PSA progression; or elevated serum neuroendocrine markers.
In the multivariate analysis, the level of albumin, AST and haemoglobin, existence of liver metastases and a decline of > 14% in PSA level had a significant impact on overall-survival.
In patients who had liver metastases (n = 92), enzalutamide was associated with a lower risk of radiographic progression (hazard ratio [HR], 0.645; 95% confidence interval [CI], 0.413-1.008), improved 12-month OS (37.7% vs 20.6%) and radiographic progression-free survival (rPFS) (11.6% vs 3.0%) rates, and higher PSA response rates (35.1% vs 4.8%) compared with placebo.