Clinical examination of cases of radiation proctitis after intensity-modulated radiation therapy for prostate cancer

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  • 強度変調放射線療法（IMRT）後における放射線性直腸炎24症例の臨床学的検討

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In our series of 366 patients who received intensity-modulated radiation therapy (IMRT) for prostate cancer, radiation proctitis developed in 24 patients. We examined the endoscopic evidence and clinical characteristics of radiation proctitis in these patients. The onset time was 2-29 months after treatment, with bloody bowel discharge being the most common symptom (22 cases). Colonoscopy revealed that the lesions tended to be concentrated on the rectal right anterior wall. Severity, according to the Tada classification, was 0b or Ia in 70.8% of all cases. The incidence of radiation proctitis decreased, and the clinical and endoscopic findings showed only mild radiation proctitis after IMRT.

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