10/12/2025 GSK's risvutatug rezetecan received the FDA orphan drug designation for SCLC Ajax Therapeutics' AJ1-11095 received the FDA orphan drug designation for myelofibrosis GSK's risvutatug rezetecan received the FDA orphan drug designation for SCLC ( Ref ) The US FDA granted the orphan drug designation to GSK's risvutatug rezetecan (B7-H3-targeted ADC) for the treatment of small-cell lung cancer (SCLC). The ODD was based on preliminary clinical data of the Phase 1 ARTEMIS