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Eur J Med Genet. 2013 Feb;56(2):114-7. doi: 10.1016/j.ejmg.2012.12.001. Epub 2012 Dec 20.

Hepatoblastoma in a child with a paternally-inherited ABCC8 mutation and mosaic paternal uniparental disomy 11p causing focal congenital hyperinsulinism.

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1
Department of Paediatric Oncology, University Hospital Southampton Foundation Trust, Southampton, UK. libbycalton@cix.co.uk

Abstract

Hepatoblastoma is a tumour of early childhood occurring in association with genetic syndromes including Beckwith-Wiedemann Syndrome (BWS) which results from dominance of paternally-inherited genes on chromosome 11p15. We report a child without clinical BWS, neonatally diagnosed with focal congenital hyperinsulinism resulting from a paternally-inherited recessively-acting mutation of ABCC8 and pancreatic paternal uniparental disomy (UPD) for chromosome 11p15, who subsequently developed hepatoblastoma. Genetic testing showed UPD 11p15 in the pancreas and liver but not systemically, allowing the expression of mutated ABCC8 in both tissues. Infants with large or multifocal forms of focal congenital hyperinsulinism may be at risk of BWS-like tumours due to mosaic UPD despite negative whole-blood and buccal DNA testing and tumour surveillance should be considered for this minority.

PMID:
23261959
DOI:
10.1016/j.ejmg.2012.12.001
[Indexed for MEDLINE]
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