Radiation therapy-related toxicity (including pneumonitis and fibrosis).

In the modern age of cancer therapy, advances in the multidisciplinary management of cancer have resulted in increased rates of survivorship. Radiation therapy (RT) toxicity must be tempered with the desire to achieve dose escalation to provide the best chance of long-term cure. This article is designed to acquaint the reader with common, expected, and potential acute and late complications of RT.