Total for the last 12 months
number of access : ?
number of downloads : ?
ID 118238
Title Alternative
日本人の限局性前立腺癌患者における小線源療法後の前立腺特異抗原レベルは晩期生化学的再発に影響する
Long-term Outcomes of Brachytherapy in Japanese Patients
Author
Ueno, Yoshiteru Tokushima University
Tomida, Ryotaro Tokushima University
Keywords
Brachytherapy
Late recurrence
Long-term follow up
Prostate cancer
without external beam radiation
long-term outcomes
Content Type
Thesis or Dissertation
Description
Background/Aim: Evaluation of long-term outcomes is essential for the successful treatment of localized prostate cancer; however, the risk of late recurrence following brachytherapy is still not clear. This study aimed to evaluate the long-term outcomes of low-dose-rate brachytherapy (LDR-BT) for localized prostate cancer in Japanese patients and identify factors associated with late recurrence after treatment. Patients and Methods: This single-center, cohort study included patients who underwent LDR-BT at the Tokushima University Hospital in Japan between July 2004 and January 2015; 418 patients, who were followed-up at least 7 years after LDR-BT, were included in the study. Biochemical progression free survival (bPFS) was defined according to the Phoenix definition (nadir PSA+2 ng/ml) and bPFS and cancer specific survival (CSS) were calculated using Kaplan-Meier survival curves. Univariate and multivariate analyses were performed using Cox proportional hazard regression models. Results: Approximately half of the patients with PSA >0.5 ng/ml at 5 years after LDR-BT had a recurrence within the next 2 years. However, only 1.4% of the patients with a PSA ≤0.2 ng/ml at 5 years post-treatment showed tumor recurrence, including those at high risk of treatment failure according to the D’Amico classification. In multivariate analysis, PSA level at 5 years post-treatment was the only predictor of late recurrence after 7 years of treatment. Conclusion: PSA levels at 5 years post-treatment were associated with long-term recurrence of localized prostate cancer, which can help alleviate patient anxiety concerning prostate cancer recurrence if PSA levels remain low at 5 years after LDR-BT.
Journal Title
in vivo
ISSN
0258851X
17917549
NCID
AA10714348
Publisher
International Institute of Anticancer Research
Volume
37
Issue
2
Start Page
738
End Page
746
Published Date
2023-03-07
Remark
内容要旨・審査要旨・論文本文の公開
本論文は,著者YOSHITERU UENOの学位論文として提出され,学位審査・授与の対象となっている。
Rights
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY-NC-ND) 4.0 international license (https://creativecommons.org/licenses/by-nc-nd/4.0).
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
ETD
MEXT report number
甲第3680号
Diploma Number
甲医第1568号
Granted Date
2023-03-03
Degree Name
Doctor of Medical Science
Grantor
Tokushima University
departments
University Hospital
Medical Sciences