Characterization and Management of Oral and Dermatological Toxicities in Patients Receiving the CD3 X GPRC5D Bispecific Antibody Talquetamab (JNJ-64407564) for the Treatment of Relapsed and/or Refractory Multiple Myeloma

Background: Talquetamab (JNJ-64407564) is a humanized IgG4 bispecific antibody that targets the CD3 receptor complex on T cells and G-protein-coupled receptor class 5 member D (GPRC5D) a transmembrane receptor protein overexpressed on malignant plasma cells in Multiple Myeloma. After 6.3 months of follow up in RRMM, talquetemab monotherapy at the recommended phase 2 dose yielded an overall response rate of 70%. Talquetemab was well tolerated and here we describe the presentation and management of dermatologic and oral adverse events (AEs) in 78 patients (pts) treated with talquetemab at a single center that is part of a multi-center, multi-national study.