AI Article Synopsis
- The study evaluated treatment outcomes in 25 patients with advanced sinus carcinoma undergoing three-dimensional conformal radiotherapy, focusing on local control, survival rates, and prognostic factors.
- Surgery was performed on most patients, with varying degrees of success, and some received chemotherapy; quality metrics were established regarding radiation dose delivery.
- The findings highlighted local tumor recurrence in many patients, with critical factors for prognosis being disease involvement in the central nervous system and nonresectable tumors, while radiation dose and tumor conformity were less significant.
Article Abstract
Purpose: To assess local control, survival, and clinical and dosimetric prognostic factors in 25 patients with locally advanced maxillary or ethmoid sinus carcinoma treated by three-dimensional conformal radiotherapy (RT).
Materials And Methods: Surgery was performed in 22 patients and was macroscopically complete in 16. Seven patients received chemotherapy (concomitant with RT in four). The following quality indexes were defined for the 95% and 90% isodoses: tumor conformity index, normal tissue conformity index, and global conformity index.
Results: The median radiation dose to the planned treatment volume was 63 Gy, with a minimal dose of 60 Gy, except in 2 patients whose cancer progressed during RT. The maximal doses tolerated by the structures involved in vision were respected, except for tumors that involved the optic nerve. After a median follow-up of 25 months, 14 local tumor recurrences developed. The major prognostic factors were central nervous system involvement by disease and the presence of nonresectable tumors. The radiation dose and tumor conformity index value were not significant prognostic indicators. Two patients died of acute infectious toxicity, and two developed late ipsilateral ocular toxicity.
Conclusions: Improving local control remains the main challenge in RT for paranasal tumors.
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| http://dx.doi.org/10.1016/s0360-3016(03)00078-6 | DOI Listing |
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