Extracorporeal Photopheresis

**Semantic type:** Therapeutic or Preventive Procedure

**Definition:** A procedure which combines apheresis and photodynamic therapy, resulting in blood being treated with a photosensitizing agent and subsequently irradiated with specified wavelengths of light to achieve an effect.

**Synonyms:** - Extracorporeal Photophoresis - Photophoresis - extracorporeal photopheresis - photopheresis