Welcome back to Rad Onc Smart Review, G.I. Oncology Edition. This is Episode 01: GI Principles: Re-RT, Toxicity, & Contouring Rare Sites.Before we dive deep into specific GI malignancies, we’re going to build a strong foundation. This episode covers four high-yield topics that cut across multiple disease sites: re-irradiation of the pelvis, management of chronic radiation proctitis, contouring inguinal nodes, and treating adrenal metastases. Mastering these principles will set you up for success throughout our entire GI series.