BOS inherited by germline mosaicism

“This is the first report of Bohring-Opitz syndrome caused by a mutation inherited from an unaffected, somatic mosaic parent with presumed germline mosaicism. This phenomenon has been reported for other traditionally de novo dominant disorders like CHARGE syndrome and Cornelia de Lange syndrome (2)(3). This case demonstrates that haploinsufficiency of ASXL1 is not lethal in the germline, and emphasizes the need for accurate low but non-negative recurrence risk counseling for families with children with Bohring-Opitz syndrome.” – Deborah Copenheaver et.al.

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