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flag U.S. FDA accepted leniolisib application for children 4–11 with rare immune disorder APDS, with decision due Jan. 31, 2026.

flag The U.S. FDA has accepted Pharming Group’s supplemental drug application for leniolisib, an oral PI3Kδ inhibitor, for children aged 4 to 11 with activated PI3Kδ syndrome (APDS), a rare immune disorder. flag The application received Priority Review, with a decision expected by January 31, 2026. flag Data from a Phase III trial showed improved disease markers—reduced lymphadenopathy and increased naïve B cells—within 12 weeks, along with eight months of safety data. flag If approved, leniolisib would be the first treatment for children under 12 with APDS globally. flag The drug, already approved for those 12 and older, is under review in several other countries. flag APDS, caused by genetic mutations, leads to recurrent infections, immune dysfunction, and long-term complications like lymphoma and lung damage, often diagnosed years after symptoms begin.

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