Acquired TSC1 Mutation as a Mechanism of Alectinib Resistance in ALK -Fused Leiomyosarcoma: Response to Combined ALK and Mammalian Target of Rapamycin Inhibition. - Posner, Alisa; Rosenberg, Carol; Esselen, Katharine M.; Kelly, Andrew; Bockorny, Bruno (JCO Precision Oncology, 2026)