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We report on a retrospective comparison of biochemical outcomes using an ultra-high dose of conventionally fractionated intensity-modulated radiation therapy (IMRT) vs. a lower dose of IMRT combined with high-dose-rate (HDR) brachytherapy to increase the biologically effective dose of IMRT.
Patients received IMRT of 86.4Gy (n=470) or HDR brachytherapy (21Gy in three fractions) followed by IMRT of 50.4Gy (n=160). Prostate-specific antigen (PSA) relapse was defined as PSA nadir+2. Median followup was 53 months for IMRT alone and 47 months for HDR.
The 5-year actuarial PSA relapse-free survival (PRFS) for HDR plus IMRT vs. ultra-high-dose IMRT were 100% vs. 98%, 98% vs. 84%, and 93% vs. 71%, for National Comprehensive Cancer Network low- (p=0.71), intermediate- (p<0.001), and high-risk (p=0.23) groups, respectively. Treatment (p=0.0006), T stage (p<0.0001), Gleason score (p<0.0001), pretreatment PSA (p=0.0037), risk group (p<0.0001), and lack of androgen-deprivation therapy (p=0.0005) were significantly associated with improved PRFS on univariate analysis. HDR plus IMRT vs. ultra-high-dose IMRT (p=0.0012, hazard ratio [HR]=0.184); age (p=0.0222, HR=0.965); and risk group (p<0.0001, HR=2.683) were associated with improved PRFS on multivariate analysis.
Dose escalation of IMRT by adding HDR brachytherapy provided improved PRFS in the treatment of prostate cancer compared with ultra-high-dose IMRT, independent of risk group on multivariate analysis, with the most significant benefit for intermediate-risk patients.
Department of Radiation Oncology, Memorial Sloan-Kettering Cancer Center New York, New York, NY.
This article was published in the following journal.
To analyse long-term overall survival, relapse-free survival and late toxicities in a series of 675 patients treated between 1999 and 2003, with a median follow-up of 132 months.
Comparison of intensive chemotherapy and hypomethylating agents prior to allogeneic stem cell transplantation for advanced MDS. A study of the MDS subcommittee of the Chronic Malignancies Working Party of the EBMT.
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With checkpoint inhibitors, patients with advanced melanoma display durable responses suggesting cure of disease. However, the immune system has dual roles in cancer; while the immune system may eradi...
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Assessment of the antitumour effect of zoledronic acid in patients with multiple myeloma and asymptomatic biochemical relapse It´s proposed to investigate the use of Zoledronic acid as s...
The first purpose of this randomized trial will be to compare the best treatment group of APL 93 trial (ATRA with early introduction of anthracycline-AraC chemotherapy, followed by 2 conso...
Comparison of two contact lens solutions.
Primary Objectives: To evaluate response rates of acute or chronic GVHD following CD8 depleted DLI in patients with CMML, CLL, NHL, MM and HD. Secondary Objectives: To evaluate saf...
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Comparison of various psychological, sociological, or cultural factors in order to assess the similarities or diversities occurring in two or more different cultures or societies.
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Period after successful treatment in which there is no appearance of the symptoms or effects of the disease.
A hematopoietic growth factor which promotes proliferation and maturation of neutrophil granulocytes. Clinically it is effective in decreasing the incidence of febrile neutropenia in patients with non-myeloid malignancies receiving myelosuppressive therapy or in reducing the duration of neutropenia and neutropenia-related clinical sequelae in patients with non-myeloid malignancies undergoing myeloblastive chemotherapy followed by BMT. It has also been used in AIDS patients with CMV retinitis being treated with GANCICLOVIR. (Gelman CR, Rumack BH & Hess AJ (eds): DRUGDEX(R) System. MICROMEDEX, Inc., Englewood, Colorado (Edition expires 11/30/95))
The survival of a graft in a host, the factors responsible for the survival and the changes occurring within the graft during growth in the host.
Prostate cancer (cancer de prostata) Prostate cancer (cancer de prostata) is a form of cancer that develops in the prostate, a gland in the male reproductive system. Most prostate cancers are slow growing; however, there are cases of aggressive prostat...
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