1. Stereotactic body radiation therapy for the treatment of localized prostate cancer in men with underlying inflammatory bowel disease.
- Author
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Lischalk JW, Blacksburg S, Mendez C, Repka M, Sanchez A, Carpenter T, Witten M, Garbus JE, Evans A, Collins SP, Katz A, and Haas J
- Subjects
- Adenocarcinoma complications, Adenocarcinoma pathology, Adenocarcinoma radiotherapy, Aged, Cohort Studies, Follow-Up Studies, Humans, Inflammatory Bowel Diseases pathology, Inflammatory Bowel Diseases radiotherapy, Male, Middle Aged, Prostate pathology, Prostate radiation effects, Prostatic Neoplasms pathology, Radiation Injuries etiology, Radiation Injuries pathology, Radiosurgery adverse effects, Radiotherapy Dosage, Radiotherapy, Intensity-Modulated, Retrospective Studies, Treatment Outcome, United States, Inflammatory Bowel Diseases complications, Prostatic Neoplasms complications, Prostatic Neoplasms radiotherapy
- Abstract
Background: Historically, IBD has been thought to increase the underlying risk of radiation related toxicity in the treatment of prostate cancer. In the modern era, contemporary radiation planning and delivery may mitigate radiation-related toxicity in this theoretically high-risk cohort. This is the first manuscript to report clinical outcomes for men diagnosed with prostate cancer and underlying IBD curatively treated with stereotactic body radiation therapy (SBRT)., Methods: A large institutional database of patients (n = 4245) treated with SBRT for adenocarcinoma of the prostate was interrogated to identify patients who were diagnosed with underlying IBD prior to treatment. All patients were treated with SBRT over five treatment fractions using a robotic radiosurgical platform and fiducial tracking. Baseline IBD characteristics including IBD subtype, pre-SBRT IBD medications, and EPIC bowel questionnaires were reviewed for the IBD cohort. Acute and late toxicity was evaluated using the CTCAE version 5.0., Results: A total of 31 patients were identified who had underlying IBD prior to SBRT for the curative treatment of prostate cancer. The majority (n = 18) were diagnosed with ulcerative colitis and were being treated with local steroid suppositories for IBD. No biochemical relapses were observed in the IBD cohort with early follow up. High-grade acute and late toxicities were rare (n = 1, grade 3 proctitis) with a median time to any GI toxicity of 22 months. Hemorrhoidal flare was the most common low-grade toxicity observed (n = 3)., Conclusion: To date, this is one of the largest groups of patients with IBD treated safely and effectively with radiation for prostate cancer and the only review of patients treated with SBRT. Caution is warranted when delivering therapeutic radiation to patients with IBD, however modern radiation techniques appear to have mitigated the risk of GI side effects., (© 2021. The Author(s).)
- Published
- 2021
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