More recently, germline pathogenic variants in ASXL2 (reported in 2016) and ASXL3 (reported in 2013) were identified as the causes for Shashi-Pena syndrome (SHAPNS; MIM# 617190]) and Bainbridge-Ropers syndrome (BRS; MIM# 615485), respectively [6, 7]. Here, ASXL3 is linked to Severe feeding difficulties - failure to thrive - microcephaly due to ASXL3 deficiency.