Target Definitionoforbital Embryonal Rhabdomyosarcoma (Rms) by Multimodality Imaging: An Original Article

Objective: Treatments strategies for orbital embryonal rhabdomyosarcoma (RMS) may include surgery, radiation therapy (RT), and chemotherapy.Satisfactory survival outcomes may be achieved for orbital embryonal RMS by use of these therapies, however, adverse effects of administered treatments are major concerns regarding management given the long life expectancy of affected patients.Within this context, improving the toxicity profile of treatment has been a critical aspect of management.In terms of RT, contemporary techniques and proton therapy have been utilized for improving the therapeutic ratio.In this original article, we assessed target definition for orbital embryonal RMS with multimodality imaging.Materials And Methods: Target definition for orbital embryonal RMS with multimodality imaging has been assessed with comparative evaluation.Results: Precise RT planning has been performed by use of treatment planning systems at our tertiary cancer center.Optimal encompassing of treatment volumes with sparing of critical structures has been prioritized in RT planning to improve the therapeytic ratio.Definition of ground truth target volume has been done by the board certified radiation oncologists following comprehensive evaluation, colleague peer review, collaboration, and ultimate consensus to be utilized for actual treatment and for comparative assessments.Ground truth target volume has been found to be identical with target volume definition with CT-MR fusion based imaging.Conclusion: Combined use of CT and MRI for accurate target and treatment volume determination procedure may be considered to improve the therapeutic ratio for orbital embryonal RMS management with RT despite the need for further supporting evidence.