Light therapy restores immune balance in rare skin cancer

This study looked at 16 people with mycosis fungoides, a rare skin lymphoma, and 16 healthy volunteers. Researchers measured a protein called IL-35, which can suppress the immune system, in blood and skin samples before and after phototherapy (light treatment). They found that IL-35 levels were much higher in patients than in healthy people, but dropped back to normal after phototherapy. The results suggest that phototherapy may help restore immune balance, and IL-35 could be used to track how well treatment is working.