Medical Dictionary

photopheresis

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noun pho·to·phe·re·sis \-fə-ˈrē-səs\

Medical Definition of photopheresis

  1. :  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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