Altered fractionation in radiotherapy: From radiobiological rationale to therapeutic gain

Summary plementation of altered fractionation schedules in clinical practice came as a need to improve loco-regional control and survival in those cancer patient groups which did not respond satisfactorily to conventionally fractionated radiotherapy. The current review aims to present the radiobiological rationale behind various non-conventional treatment schedules including the encountered challenges, through a compilation of clinical studies/trials and their contribution towards therapeutic gain.