External radiotherapy.
D001706:Biopsy; D005221:Fatigue / Q000209:etiology; D005767:Gastrointestinal Diseases / Q000209:etiology; D049673:History, 20th Century; D006801:Humans; D007248:Infertility, Male / Q000209:etiology; D008297:Male; D009367:Neoplasm Staging; D011379:Prognosis; D011471:Prostatic Neoplasms / Q000532:radiotherapy*; D011878:Radiotherapy / Q000009:adverse effects / Q000266:history / Q000379:methods; D011879:Radiotherapy Dosage; D014555:Urination Disorders / Q000209:etiology