photopheresis
/ˌfəʊtəʊˈfɛrɪsɪs/ /ˌfəʊtəʊfəˈriːsɪs/Medicine
noun
More fully extracorporeal photopheresis. Photodynamic therapy of blood as it circulates outside the body, used especially in the treatment of certain haematological malignancies and autoimmune disorders.
Origin
1980s. From photo- + aphaeresis, after plasmapheresis.