MAPK3 and glomus tumor: The cells from the glomus tumors in the report by Brems et al. [10] showed increased activation of extracellular-regulated kinases 1 and 2 (ERK1/2) phosphorylation (p-ERK1/2) after stimulation with acidic fibroblast growth factor in the NF1-associated glomus tumor-derived glomus cells.