Fig. 4From: Clinical proteomics for prostate cancer: understanding prostate cancer pathology and protein biomarkers for improved disease managementThe Gleason Scoring System. Pathologists evaluate prostate biopsy samples and ‘grade’ tumour regions based on defined architectural patterns (a). Regions of Gleason grade 3, Gleason grade 4 and Gleason grade 5 tumour as observed under the microscope are shown (b). Image is adapted from Humphrey et al. [56]Back to article page