prostate tumor measurement tumor incidence/prevalence measurement prostate tumorous lesion incidence/prevalence measurement prostate tumor incidence/prevalence measurement 2012-07-16T12:50:43Z A measurement in which the number of individuals in a study population displaying at a point in time one or more prostate tumors--that is, abnormal growth(s) of the tissue of the prostate gland, the gland surrounding the male urethra just below the base of the bladder which secretes a fluid that constitutes a major portion of the semen, resulting from uncontrolled, progressive multiplication of cells which serve no physiological function--or developing such growths within a determined period of time, are compared to the total number of individuals in the study population. Often expressed as a percentage but could be expressed as a ratio. CMO:0000935 JSmith Not4Curation clinical_measurement_ontology