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- Title
Dose-volume Histogram-based Predictors for Hematuria and Rectal Hemorrhage in Patients Receiving Radiotherapy After Radical Prostatectomy.
- Authors
KATSUYUKI SHIRAI; MASATO SUZUKI; KEIKO AKAHANE; YUTA TAKAHASHI; MASAHIRO KAWAHARA; ERIKA YAMADA; MASARU WAKATSUKI; KAZUNARI OGAWA; SATROU TAKAHASHI; KYOSUKE MINATO; KOHEI HAMAMOTO; KIMITOSHI SAITO; MASASHI OSHIMA; TSUZUMI KONISHI; YUHKI NAKAMURA; SATOSHI WASHINO; TOMOAKI MIYAGAWA
- Abstract
Aim: The aim of this study was to evaluate the dose-volume histogram parameters for late hematuria and rectal hemorrhage in patients receiving radiotherapy after radical prostatectomy. Patients and Methods: Data of 86 patients treated between January 2006 and June 2019 were retrospectively evaluated. The median radiation dose was 64 Gy in 32 fractions. Receiver operating characteristic (ROC) curves were used to identify optimal cut-off values for late adverse events. Results: Eleven patients experienced hematuria, and the 5-year cumulative rate was 18%. Four patients experienced rectal hemorrhage, and the 5-year cumulative rate was 7%. ROC curve analysis demonstrated the following significant cut-off values: bladder V50 Gy: 43% (p=0.02) and V40 Gy: 50% (p=0.03) for hematuria, and rectum V60 Gy: 13% (p=0.04) and V50 Gy: 33% (p=0.03) for rectal hemorrhage. Conclusion: This is the first study to identify dose constraints that may reduce hematuria and rectal hemorrhage in patients receiving radiotherapy in the postoperative setting.
- Subjects
HEMATURIA; PROSTATE cancer treatment; PROSTATECTOMY; CANCER radiotherapy; POSTOPERATIVE period
- Publication
In Vivo, 2020, Vol 34, Issue 3, p1289
- ISSN
0258-851X
- Publication type
Article
- DOI
10.21873/invivo.11904