PRIMARY Score

The PRIMARY score is a 5-category scale developed to identify clinically significant intraprostate malignancy (csPCa) on 68Ga-prostatespecific membrane antigen (PSMA) PET/CT (68Ga-PSMA PET) using a combination of anatomic site, pattern, and intensity. 

This scoring system incorporating intraprostatic patterns and intensity on 68Ga-PSMA PET/CT shows potential as an accurate method for diagnosing csPCa and should be considered when PSMA PET is undertaken for this purpose.

Department of Nuclear Medicine & Theranostics, St Vincent's Hospital Sydney