RAD21 and Mungan syndrome: RAD21 variants have also been associated with sclerocornea (Zhang et al. 2019) and Mungan syndrome (Chronic Idiopatic Intestinal Pseudoobstruction; OMIM #611376, in patients with biallelic RAD21 variants) (Bonora et al. 2015; Mungan et al. 2003), each in a single family in which no remarks on CdLS features were made in the report.