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  • Title: Identification of NSDHL mutations associated with CHILD syndrome in oral verruciform xanthoma.
    Author: Getz GI, Parag-Sharma K, Reside J, Padilla RJ, Amelio AL.
    Journal: Oral Surg Oral Med Oral Pathol Oral Radiol; 2019 Jul; 128(1):60-69. PubMed ID: 31078502.
    Abstract:
    OBJECTIVE: The aim of this study was to perform a systematic analysis of the nicotinamide adenine dinucleotide phosphate (NAD[P])-dependent steroid dehydrogenase-like (NSDHL) gene in cases of oral verruciform xanthoma (VX) and to test for the presence of mutations associated with congenital hemidysplasia with ichthyosiform nevus and limb defects (CHILD) syndrome. STUDY DESIGN: DNA was extracted from archived paraffin-embedded tissue of oral VX and control cases. Polymerase chain reaction (PCR) was then used to screen exons 4 and 6 of the NSDHL gene for the presence of 4 known germline mutations associated with CHILD syndrome and 1 somatic mutation previously identified in VX lesions with no known association with CHILD syndrome. RESULTS: Of the 16 oral VX tissue samples, 8 (50%) had known missense mutations associated with CHILD syndrome. Furthermore, 2 of these 8 tissue samples also had an additional missense mutation previously identified in cutaneous VX lesions. No mutations of exons 4 and 6 were found in the 5 negative control tissue samples. CONCLUSIONS: NSDHL gene mutations associated with CHILD syndrome are common in sporadic oral VX cases, suggesting that these mutations confer a greater risk for the development of epithelial barrier defects that promote recurrent oral VX lesions and the potential for direct germline transmission of oral VX susceptibility.
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