Familial progressive hyper- and hypopigmentation and malignancy in two families with new mutations in KITLG

TY - JOUR

T1 - Familial progressive hyper- and hypopigmentation and malignancy in two families with new mutations in KITLG

AU - Cuell, A.

AU - Bansal, N.

AU - Cole, T.

AU - Kaur, M. R.

AU - Lee, J.

AU - Loffeld, A.

AU - Moss, C.

AU - O'Donnell, M.

AU - Takeichi, T.

AU - Thind, C. K.

AU - McGrath, J. A.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - Background Familial progressive hyper- and hypopigmentation (FPHH) is an autosomal dominant skin condition presenting in childhood with generalized macular dyspigmentation, usually reported in patients of East Asian origin. It overlaps phenotypically with other dyschromatoses, but can now be distinguished by mutations in the KIT ligand gene (KITLG). Aim We report two unrelated white families with similar phenotypic presentations of FPHH developing in early childhood in several generations. Methods Sanger sequencing of the exons and flanking introns of KITLG was performed. Results This identified a new heterozygous missense mutation in each family (p.Thr34Asn and p.Val37Gly, respectively). Of the six affected individuals examined by us, two had cancer: a 62-year-old man in family 1 had developed two primary melanomas and a pharyngeal carcinoma, and a 42-year-old woman in family 2 had developed thyroid carcinoma. All had unusually sparse lateral eyebrows, a finding not previously reported in this condition. Conclusions We summarize the genetic spectrum of the dyschromatoses and discuss a possible increased risk of malignancy in FPHH.

AB - Background Familial progressive hyper- and hypopigmentation (FPHH) is an autosomal dominant skin condition presenting in childhood with generalized macular dyspigmentation, usually reported in patients of East Asian origin. It overlaps phenotypically with other dyschromatoses, but can now be distinguished by mutations in the KIT ligand gene (KITLG). Aim We report two unrelated white families with similar phenotypic presentations of FPHH developing in early childhood in several generations. Methods Sanger sequencing of the exons and flanking introns of KITLG was performed. Results This identified a new heterozygous missense mutation in each family (p.Thr34Asn and p.Val37Gly, respectively). Of the six affected individuals examined by us, two had cancer: a 62-year-old man in family 1 had developed two primary melanomas and a pharyngeal carcinoma, and a 42-year-old woman in family 2 had developed thyroid carcinoma. All had unusually sparse lateral eyebrows, a finding not previously reported in this condition. Conclusions We summarize the genetic spectrum of the dyschromatoses and discuss a possible increased risk of malignancy in FPHH.

UR - http://www.scopus.com/inward/record.url?scp=84946548610&partnerID=8YFLogxK

U2 - 10.1111/ced.12702

DO - 10.1111/ced.12702

M3 - Article

AN - SCOPUS:84946548610

SN - 0307-6938

VL - 40

SP - 860

EP - 864

JO - Clinical and Experimental Dermatology

JF - Clinical and Experimental Dermatology

IS - 8

ER -