An instance of prostate cancer that is caused by an inherited genomic modification in an individual. Familial prostate cancer (FPC) is a malignant tumor of the prostate with an early onset. FPC is either asymptomatic or causes mictionary symptoms, erectile dysfunction, bone pain, venous compression and infectious or inflammatory syndrome (for the metastatic forms). It is also characterized by familial antecedents. The disease is Monarch Disease Ontology term MONDO_0700275 (prostate cancer, hereditary).