Total Lymphoid Irradiation

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** The use of extensive lymphatic irradiation to achieve immunosuppression. The irradiated areas includ the cervical, supraclavicular, and axillary lymph nodes, and the mediastinal region, as well as the the porta hepatis, celiac nodes, splenic pedicle and spleen, and para-aortic, iliac, inguinal, and femoral nodes.

**Synonyms:** - TLI