Extended-Field Radiation Therapy

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** Radiation treatment delivered to large areas of the body, used primarily in patients with Hodgkin lymphoma. It involves the treatment of the lymph nodes that are affected by the disease, as well as the surrounding lymph node areas that the disease may have affected but is not clinically detected.

**Synonyms:** - EFRT - Extended field radiation