KMT2C (lysine (K)-specific methyltransferase 2C) promotes the methylation of histone H3 and regulates gene transcription, and even though it is described as TSG in medulloblastoma in COSMIC (https://cancer.sanger.ac.uk/cosmic/census?tier=all#cl_search; accessed on 25 May 2020) in TNBC specifically, it is characterized as both a tumor suppressor and an oncogene. The gene discussed is KMT2C; the disease is neoplasm.