What is the best treatment for a medically inoperable endometrial adenocarcinoma of the uterus FIGO 1, grade 1, type 1?   

I would get a pelvic MRI to assess tumor size and myometrial involvement. If small volume (2 cm or smaller) with superficial invasion then use brachy alone, otherwise EBRT plus brachy. The type of brachy is based on uterine width: If the width is less than 5 cm: single tandem ...