2736
This report presents a case of colon perforation which occurred 4 months after treatment with intraperitoneal chromic phosphate for stage IB ovarian papillary serous cystadenocarcinoma.
 adverse event: occurred 
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: occurred 