2585
We report the case histories of two patients with histologically confirmed adenocarcinoma of the prostate, both of whom had been treated with steroidal anti-androgen therapy in the form of cyproterone acetate prior to radical or palliative pelvic irradiation, and who subsequently developed femoral head avascular necrosis.
 adverse event: treated 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: treated 