ERBB Signaling Interrupted: Targeting Ligand-Induced Pathway Activation.

<b/> A patient with advanced lung adenocarcinoma harboring a CD74-NRG1 gene rearrangement, which promotes ERBB2-ERBB3 heterodimerization and activation of downstream signaling, had an exceptional therapeutic response to an experimental anti-ERBB3 antibody. This result illustrates how NRG1 rearrangements, which are observed at a low frequency in a variety of solid tumors, may represent tractable therapeutic targets. Cancer Discov; 8(6); 676-8. ©2018 AACR.See related article by Drilon et al., p. 686. ©2018 American Association for Cancer Research.