photopheresis

noun
pho·​to·​phe·​re·​sis | \ -fə-ˈrē-səs How to pronounce photopheresis (audio) \

Medical Definition of photopheresis

: an immunomodulating therapy used especially to treat cutaneous T-cell lymphomas that involves treating blood with a photoactive drug (as methoxsalen), obtaining a fraction rich in white blood cells, exposing the fraction to damaging ultraviolet radiation, and returning it to the body where it stimulates a therapeutic immunological response

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“Photopheresis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/photopheresis. Accessed 30 Oct. 2020.

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