WBangstad syndrome
WBannayan–Riley–Ruvalcaba syndromeWCardiofaciocutaneous syndrome
WCDK13-related disorderWDeSanctis–Cacchione syndromeWDubowitz syndromeWFeingold syndromeWGalloway Mowat syndrome
WGreig cephalopolysyndactyly syndrome
WLanger–Giedion syndrome
WMacrocephaly-capillary malformationWMarden–Walker syndromeWNijmegen breakage syndrome
WOkamoto syndromeWPerlman syndrome
WSmith–Lemli–Opitz syndrome
WStrømme syndrome