ABSTRACT
PURPOSE: To determine the feasibility of combined long-term luteinizing hormone-releasing hormone agonist-based androgen suppressive therapy (AST) and dose escalation with high-dose-rate (HDR) brachytherapy for high-risk (HRPC) or very-high-risk prostate cancer (VHRPC). METHODS AND MATERIALS: Between January 2001 and October 2006, 134 patients (median age, 70 years) with either National Comprehensive Cancer Network criteria-defined HRPC (n = 47, 35.1%) or VHRPC (n = 87, 64.9%) were prospectively enrolled in this Phase II trial. Tumor characteristics included a median pretreatment prostate-specific antigen level of 14.6 ng/mL, a median clinical stage of T2c, and a median Gleason score of 7. Three-dimensional conformal radiotherapy (54 Gy in 30 fractions) was followed by HDR brachytherapy (19 Gy in 4 b.i.d. treatments). Androgen suppressive therapy started 0-3 months before three-dimensional conformal radiotherapy and continued for 2 years. RESULTS: One implant was repositioned with a new procedure (0.7%). Five patients (3.7%) discontinued AST at a median of 13 months (range, 6-18 months) because of disease progression (n = 1), hot flashes (n = 2), fatigue (n = 1), and impotence (n = 1). After a median follow-up of 37.4 months (range, 24-90 months), the highest Radiation Therapy Oncology Group-defined late urinary toxicities were Grade 0 in 47.8%, Grade 1 in 38.1%, Grade 2 in 7.5%, and Grade 3 in 6.7% of patients. Maximal late gastrointestinal toxicities were Grade 0 in 73.1%, Grade 1 in 16.4%, Grade 2 in 7.5%, and Grade 3 in 2.9% of patients. There were no Grade 4 or 5 events. CONCLUSIONS: Intermediate-term results show that dose escalation with HDR brachytherapy combined with long-term AST is feasible and has a toxicity profile similar to that reported by previous HDR brachytherapy studies.
Subject(s)
Androgen Antagonists/therapeutic use , Brachytherapy/methods , Prostatic Neoplasms/drug therapy , Prostatic Neoplasms/radiotherapy , Radiotherapy, Conformal/methods , Aged , Aged, 80 and over , Androgen Antagonists/adverse effects , Brachytherapy/adverse effects , Combined Modality Therapy/adverse effects , Combined Modality Therapy/methods , Dose Fractionation, Radiation , Feasibility Studies , Gastrointestinal Tract/radiation effects , Gonadotropin-Releasing Hormone/agonists , Humans , Male , Middle Aged , Prospective Studies , Prostate-Specific Antigen/blood , Prostatic Neoplasms/blood , Prostatic Neoplasms/pathology , Radiotherapy, Conformal/adverse effects , Urogenital System/radiation effectsABSTRACT
BACKGROUND: This study was undertaken to determine the feasibility of perioperative high-dose-rate brachytherapy (PHDRB) as an adjunct to salvage surgery in primary advanced or recurrent gynecologic cancer. METHODS: Twenty-five patients with either locally advanced (n = 4) or recurrent (n = 21) gynecologic cancer suitable for salvage surgery were included. Unirradiated patients were treated with preoperative chemoradiation followed by salvage surgery and PHDRB (R0 and R1 resections receiving 16 or 24 Gy, respectively). Previously irradiated patients were treated with salvage surgery and PHDRB alone with 32 or 40 Gy for R0 or R1 resections, respectively. RESULTS: Resections were categorized as R0 in 9 patients (36.0%) and R1 in 16 (64.0%). Four previously irradiated patients suffered fatal pelvic bleeding between 8 and 13 months after surgery and PHDRB. After a median follow-up of 20 months (3-55+), the 4-year actuarial local and pelvic controls were 88.1% and 80.8%, respectively. The 4-year distant metastases-free survival was 40.9%. Four-year actuarial overall survival was 34.0%, with a median survival of 27.1 months (95% confidence interval: 17.5-36.8). CONCLUSIONS: Local and pelvic control results are excellent for this very high-risk-disease population. PHDRB dose in previously irradiated patients has been shifted to the closest lower level due to unacceptable vascular toxicity.
Subject(s)
Brachytherapy/methods , Genital Neoplasms, Female/radiotherapy , Adult , Aged , Brachytherapy/adverse effects , Combined Modality Therapy , Feasibility Studies , Female , Genital Neoplasms, Female/mortality , Genital Neoplasms, Female/surgery , Humans , Middle Aged , Neoplasm Recurrence, Local , Perioperative Care , Salvage Therapy , Survival Rate , Treatment OutcomeABSTRACT
PURPOSE: This study was undertaken to determine the feasibility of perioperative high-dose-rate brachytherapy (PHDRB) as an alternative to standard low-dose-rate brachytherapy in adult patients with soft tissue sarcomas. METHODS AND MATERIALS: Twenty-five adult patients with soft tissue sarcomas of the extremities or the superficial trunk were treated with surgical resection and PHDRB (16, 24, or 32Gy) for negative, close/microscopically positive, or grossly involved surgical resection margins, respectively. External beam radiation therapy (45Gy) was added postoperatively. Adjuvant chemotherapy with ifosfamide and doxorubicin was given to patients with high-grade tumors. RESULTS: Resection margins were negative in 6 patients (24.0%), close/microscopically positive in 18 (72.0%), and grossly involved in 1 (4.0%). One patient (4.0%) with wound dehiscence needed reoperation. Three patients failed in the anatomical region treated, but relapse sites were not adjacent to the area treated with PHDRB. After a median followup of 23.2 months (range 2.8-48.0), the 4-year local and regional control rates were 100% and 80.5%, respectively. Four-year overall survival was 78.2%. CONCLUSIONS: Locoregional control and survival results are encouraging for this high-risk patient population. PHDRB results seem to be similar to those obtained with low-dose-rate brachytherapy.
