Prediction of seed migration after transperineal interstitial prostate brachytherapy with I-125 free seeds

Akitomo Sugawara, Jun Nakashima, Naoyuki Shigematsu, Etsuo Kunieda, Atsushi Kubo

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Purpose: The present study was undertaken to determine the incidence and predictors of seed migration after transperineal interstitial prostate brachytherapy using I-125 free seeds. Methods and Materials: Between September 2004 and November 2007, 158 patients who underwent transperineal interstitial prostate brachytherapy as monotherapy for clinical T1/T2 carcinoma of the prostate gland were reviewed. Implants had been performed with standard techniques. All 158 patients underwent followup radiographs (orthogonal chest radiographs, a kidney-ureter-bladder radiograph, and a posteroanterior pelvic radiograph) to assess the presence of seed migration at 3 months after transperineal interstitial prostate brachytherapy. Patient characteristics and treatment status were recorded. Univariate and multivariate analyses were performed to identify predictors of seed migration. Results: Seed migration occurred in 35 of 158 patients (22.2%). Univariate analyses revealed that preoperative prostate volume estimated by transrectal ultrasound, the number of needles, the number of seeds implanted, and the presence or absence of pubic arch interference (PAI) were significantly associated with seed migration. These results indicated that larger prostate glands were more likely to have seed migration. However, the absolute difference in prostate size was not overly impressive (22.4 vs. 26.3 cm3). Multivariate analysis revealed that the number of seeds implanted and the presence or absence of PAI were significant predictors of seed migration. Conclusion: The number of seeds implanted and the presence or absence of PAI provide the most predictive information on seed migration.

Original languageEnglish
Pages (from-to)52-56
Number of pages5
JournalBrachytherapy
Volume8
Issue number1
DOIs
Publication statusPublished - 2009 Jan

Fingerprint

Brachytherapy
Prostate
Seeds
Multivariate Analysis
Ureter
Needles
Urinary Bladder
Thorax
Carcinoma
Kidney

Keywords

  • Brachytherapy
  • I-125
  • Migration
  • Prostate cancer
  • Seed

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging

Cite this

Prediction of seed migration after transperineal interstitial prostate brachytherapy with I-125 free seeds. / Sugawara, Akitomo; Nakashima, Jun; Shigematsu, Naoyuki; Kunieda, Etsuo; Kubo, Atsushi.

In: Brachytherapy, Vol. 8, No. 1, 01.2009, p. 52-56.

Research output: Contribution to journalArticle

Sugawara, Akitomo ; Nakashima, Jun ; Shigematsu, Naoyuki ; Kunieda, Etsuo ; Kubo, Atsushi. / Prediction of seed migration after transperineal interstitial prostate brachytherapy with I-125 free seeds. In: Brachytherapy. 2009 ; Vol. 8, No. 1. pp. 52-56.
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abstract = "Purpose: The present study was undertaken to determine the incidence and predictors of seed migration after transperineal interstitial prostate brachytherapy using I-125 free seeds. Methods and Materials: Between September 2004 and November 2007, 158 patients who underwent transperineal interstitial prostate brachytherapy as monotherapy for clinical T1/T2 carcinoma of the prostate gland were reviewed. Implants had been performed with standard techniques. All 158 patients underwent followup radiographs (orthogonal chest radiographs, a kidney-ureter-bladder radiograph, and a posteroanterior pelvic radiograph) to assess the presence of seed migration at 3 months after transperineal interstitial prostate brachytherapy. Patient characteristics and treatment status were recorded. Univariate and multivariate analyses were performed to identify predictors of seed migration. Results: Seed migration occurred in 35 of 158 patients (22.2{\%}). Univariate analyses revealed that preoperative prostate volume estimated by transrectal ultrasound, the number of needles, the number of seeds implanted, and the presence or absence of pubic arch interference (PAI) were significantly associated with seed migration. These results indicated that larger prostate glands were more likely to have seed migration. However, the absolute difference in prostate size was not overly impressive (22.4 vs. 26.3 cm3). Multivariate analysis revealed that the number of seeds implanted and the presence or absence of PAI were significant predictors of seed migration. Conclusion: The number of seeds implanted and the presence or absence of PAI provide the most predictive information on seed migration.",
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AB - Purpose: The present study was undertaken to determine the incidence and predictors of seed migration after transperineal interstitial prostate brachytherapy using I-125 free seeds. Methods and Materials: Between September 2004 and November 2007, 158 patients who underwent transperineal interstitial prostate brachytherapy as monotherapy for clinical T1/T2 carcinoma of the prostate gland were reviewed. Implants had been performed with standard techniques. All 158 patients underwent followup radiographs (orthogonal chest radiographs, a kidney-ureter-bladder radiograph, and a posteroanterior pelvic radiograph) to assess the presence of seed migration at 3 months after transperineal interstitial prostate brachytherapy. Patient characteristics and treatment status were recorded. Univariate and multivariate analyses were performed to identify predictors of seed migration. Results: Seed migration occurred in 35 of 158 patients (22.2%). Univariate analyses revealed that preoperative prostate volume estimated by transrectal ultrasound, the number of needles, the number of seeds implanted, and the presence or absence of pubic arch interference (PAI) were significantly associated with seed migration. These results indicated that larger prostate glands were more likely to have seed migration. However, the absolute difference in prostate size was not overly impressive (22.4 vs. 26.3 cm3). Multivariate analysis revealed that the number of seeds implanted and the presence or absence of PAI were significant predictors of seed migration. Conclusion: The number of seeds implanted and the presence or absence of PAI provide the most predictive information on seed migration.

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