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Combined treatment with temporary short-term high dose rate Iridium-192 brachytherapy and external beam radiotherapy for irradiation of localized prostatic carcinoma

Authors
Journal
Radiotherapy and Oncology
0167-8140
Publisher
Elsevier
Publication Date
Volume
44
Issue
3
Identifiers
DOI: 10.1016/s0167-8140(97)00121-7
Keywords
  • Radiotherapy
  • Brachytherapy
  • Localized Prostate Cancer
  • Clinical Outcome
Disciplines
  • Medicine

Abstract

Abstract Purpose: To evaluate the treatment outcome after radical radiotherapy of localized prostate cancer in 50 patients (38 patients with stage T1–2 and 12 patients with stage T3) after a median follow-up time of 45 months (range 18–92 months). Methods: The treatment was given by combination of external beam radiotherapy (50 Gy) and brachytherapy (2 × 10 Gy). The brachytherapy was given using TRUS-guided percutaneously inserted temporary needles with a high dose rate remote afterloading technique with Ir-192 as the radionuclide source. Three target definitions and dose levels inside the prostate gland were used. Local control was evaluated by digital rectal examination, TRUS-guided biopsies and serum PSA evaluations. Results: Clinical and biopsy verified local control was achieved in 48 of the 50 (96%) patients; for stage T1–2 in 37 of 38 (97%) patients and for stage T3 in 11 of 12 (92%) patients. A posttreatment serum PSA level ≤1.0 ng/ml was seen in 42 (84%) patients, values from >1.0 to ≤2.0 ng/ml were seen in four (8%) patients and values exceeding 2.0 were seen in four (8%) patients. The late toxicity was minimal. Conclusion: The local control results and the minimal toxicity after the combined radiotherapy treatment are promising. However, long term results are necessary before general use.

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