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-0