International journal of radiation oncology, biology, physics
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Int. J. Radiat. Oncol. Biol. Phys. · Oct 2010
Prescription dose guideline based on physical criterion for multiple metastatic brain tumors treated with stereotactic radiosurgery.
Existing dose guidelines for intracranial stereotactic radiosurgery (SRS) are primarily based on single-target treatment data. This study investigated dose guidelines for multiple targets treated with SRS. ⋯ Normal brain dose increases predictably with increasing number of targets for multitarget SRS. A reduction of approximately 1-2 Gy in the prescribed dose is needed compared with single target radiosurgery.
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Int. J. Radiat. Oncol. Biol. Phys. · Oct 2010
Comparative StudyTotal body irradiation compared with BEAM: Long-term outcomes of peripheral blood autologous stem cell transplantation for non-Hodgkin's lymphoma.
The optimal preparative regimen for non-Hodgkin's lymphoma patients undergoing autologous peripheral blood stem cell transplantation (PBSCT) is unknown. We compared a total body irradiation (TBI)-based regimen with a chemotherapy-alone regimen. ⋯ A 12-Gy TBI-based conditioning regimen for PBSCT for non-Hodgkin's lymphoma resulted in disease relapse-free survival and OS similar to that after BEAM. PBSCT before 2000, and not the conditioning regimen, was an important predictor of long-term outcomes. TBI was not associated with more acute toxicity or pneumonitis. We found no indication that the TBI regimen was inferior or superior to BEAM.
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Int. J. Radiat. Oncol. Biol. Phys. · Oct 2010
Stereotactic radiosurgery for treatment of spinal metastases recurring in close proximity to previously irradiated spinal cord.
As the spinal cord tolerance often precludes reirradiation with conventional techniques, local recurrence within a previously irradiated field presents a treatment challenge. ⋯ SRS is safe and effective in the treatment of spinal metastases recurring in previously irradiated fields. Tumor recurrence within 12 months may correlate with biologic aggressiveness and require higher SRS doses (SSED >15 Gy(10)). Further research is needed to define the partial volume retreatment tolerance of the spinal cord and the optimal target dose.
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Int. J. Radiat. Oncol. Biol. Phys. · Oct 2010
Comparative StudyHypofractionated whole-brain radiotherapy for multiple brain metastases from transitional cell carcinoma of the bladder.
Brain metastases in bladder cancer patients are extremely rare. Most patients with multiple lesions receive longer-course whole-brain radiotherapy (WBRT) with 10 × 3 Gy/2 weeks or 20 × 2 Gy/4 weeks. Because its radiosensitivity is relatively low, metastases from bladder cancer may be treated better with hypofractionated radiotherapy. This study compared short-course hypofractionated WBRT (5 × 4 Gy/1 week) to longer-course WBRT. ⋯ Short-course WBRT with 5 × 4 Gy should be seriously considered for most patients with multiple brain metastases from bladder cancer, as it resulted in improved LC.