Iranian Journal of Neonatology

Iranian Journal of Neonatology

Thanatophoric Dysplasia in Newborn Twins:Case Report and Literature Review

Document Type : Case Report

Authors
Shahin Mafinezhad 1
Yasaman Bozorgnia 2
Reza Gharaee 1
1 Department of pediatrics, Fellow of Neonatology, Mashhad University of Medical Sciences, Mashhad, Iran
2 Department of dentistry, Resident of Orthodontics, Mashhad University of Medical Sciences, Mashhad, Iran
10.22038/ijn.2012.281
Abstract
 
Thanatophoricdysplasia (TD) isanosteochondrodysplasiaalwayslethalintheneonatalperiod. Thevastmajorityofcasesareduetodenovomutations. Itisdividedintotwotypes: ashortcurvedfemurcharacterizestype 1, whileastraighterfemurwithcloverleafskullcharacterizestype 2. Inthanatophoricdysplasiathelimbsareveryshort. Theribcageissmall. Thevertebralbodiesofthespinearegreatlyreducedinheightwithwidespacesbetweenthem. Autosomaldominantmutationsinthefibroblastgrowthfactorreceptor 3 gene (FGFR3), whichhasbeenmappedtochromosomeband 4p16.3, resultsinbothsubtypes. Thisconditionhascharacteristicsonographicfeaturesthatsuggestthediagnosisprenatally. Thanatophoricfetusesusuallydiewithinthefirst 48 hoursoflifefrompulmonaryhypoplasiacausedbyanarrowthorax, leadingtorespiratoryinsufficiency. Wereportedtwindizygotecasesoftype 1 TDwithsimilarfindingsadjustingwithTDforthefirsttime, alongwithashortreviewoftheavailableliterature.
 
Keywords
Thanatophoric dysplasia
Newborn
Twins