MECP2 and atypical Rett syndrome: Case 1 showed a heterozygous variant MECP2 (NM_001110792.2): c.352C > T (p.Arg118Trp), rs28934907, located at ChrX:153297719 (GRCh37); pathogenic as per ACMG guidelines, causes Rett Syndrome and is extensively published [6].