Waardenburg Syndrome | Figure 2.26 A: Waardenburg syndrome (Reprint from Levine N, Levine CC. Dermatologic Therapy: A–Z Essentials. New York: Springer; 2009.) B: Clinodactyly of 5th finger |
(Figure 2.26A) | | | | | Type | | Inh | | Defect | | Clinical | | WS, Type 1 | | AD | | PAX3 (transcription factor) | | White forelock, leukoderma, heterochromia iridis, synophrys, dystopia canthorum (characteristic), broad nasal root, deafness uncommon | | WS, Type 2 | | AD | | MITF (transcription factor) | | Similar to WS1 but dystopia canthorum absent, deafness common | | WS, Type 3 | | AD | | PAX3 | | Similar to WS1 + upper limb abnormalities (hypoplasia, syndactyly, flexion contractures) | | WS, Type 4 | | AD AR | | SOX10 (TF)
EDN3 (endothelin-3)
EDNRB (endothelin receptor) | | Similar to WS1 + Hirschsprung disease, deafness common |
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