Abstract
It is increasingly being recognized that oral cavity cancer incidences are rising globally. Furthermore, these tumors represent a high risk group of tumors comparative to other head and neck tumor sub-sites and have a high preponderance of occult nodal metastases. Surgery alone leads to excellent outcomes in early stage disease. Advanced tumors require adjuvant radiotherapy with or without concomitant chemotherapy. Irradiation using 3D conformal radiotherapy results in high incidence of late radiation side-effects. Xersostomia and mandibular osteoradionecrosis result in most significant effects on patients' quality of life. Intensity modulated radiotherapy (IMRT) is an advanced approach to 3-D treatment planning and conformal therapy (3D-CRT). It optimizes the delivery of irradiation to irregularly-shaped volumes and has the ability to produce concavities in radiation treatment volumes and hence enables sparing of normal tissue while delivering adequate doses to the tumor volumes. In this manuscript, we discuss the advantages of IMRT based on review of published peer reviewed literature.
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