Introduction
esophageal cancer, head and neck, lung, cervical, and anal cancer, Treatment-related, epithelial malignant neoplasms, inferior tumor
ESOPHAGEAL CANCER, OESOPHAGEAL CANCER
Radiotherapy (RT) and chemoradiotherapy (CRT) are used for the curative treatment of many epithelial malignant neoplasms. Treatment-related toxic effects may lead to treatment interruptions and prolonged treatment duration. In the curative treatment of head and neck, lung, cervical, and anal cancer with RT and/or CRT, treatment interruptions and prolonged treatment duration have been associated with inferior tumor local control and/or survival.In patients with esophageal cancer who were treated with definitive CRT, the effect of RT treatment interruptions and prolonged RT duration on local control and survival has not been well studied. This topic is of elevated relevance and importance in the context of the COVID-19 pandemic, which may force difficult decisions regarding potential disruptions in delivery of RT for patients with esophageal cancer.