Abstract
The Polycomb transcriptional repressors regulate normal tissue homeostasis and their function is often hijacked during oncogenesis. We recently uncovered the Polycomb repressive complex-2 (PRC2) genes Ezh2 and Eed as oncogenotype-dependent cancer genes. Notably, within the same oncogenotype, PRC2 dosage modulates lung tumor homeostasis and critically impacts non-tumor tissue function.