Funding sources These studies were supported by NIH/NIAMS grants R01 AR28450 and R01 AR55225 (J.U.). Q.L. is the recipient of a Research Career Development Award from Dermatology Foundation.
Cutaneous features of pseudoxanthoma elasticum in a patient with generalized arterial calcification of infancy due to a homozygous missense mutation in the ENPP1 gene
Article first published online: 4 APR 2012
© 2012 The Authors. BJD © 2012 British Association of Dermatologists
British Journal of Dermatology
Volume 166, Issue 5, pages 1107–1111, May 2012
How to Cite
Li, Q., Schumacher, W., Jablonski, D., Siegel, D. and Uitto, J. (2012), Cutaneous features of pseudoxanthoma elasticum in a patient with generalized arterial calcification of infancy due to a homozygous missense mutation in the ENPP1 gene. British Journal of Dermatology, 166: 1107–1111. doi: 10.1111/j.1365-2133.2012.10811.x
Conflicts of interest None declared.
Q.L. and W.S. contributed equally to this study.
- Issue published online: 23 APR 2012
- Article first published online: 4 APR 2012
- Accepted manuscript online: 9 JAN 2012 03:58PM EST
- Accepted for publication 31 December 2011
Background Pseudoxanthoma elasticum (PXE) manifests with cutaneous lesions consisting of yellowish papules coalescing into plaques of inelastic skin. Histopathology demonstrates accumulation of pleiomorphic elastic structures with progressive mineralization. The classic form of PXE is caused by mutations in the ABCC6 gene.
Objectives A 2-year-old patient with PXE of the neck, inguinal folds and lower abdomen, and with extensive tissue mineralization, was evaluated for the underlying mutations in candidate genes known to be involved in ectopic mineralization disorders.
Methods The patient’s genotype was studied by sequencing ABCC6, MGP and ENPP1 genes, encoding proteins which harbour mutations in ectopic mineralization disorders.
Results No pathogenetic mutations were found in the ABCC6 or MGP genes. Sequencing of ENPP1 disclosed a homozygous missense mutation, p.Y513C, associated with generalized arterial calcification of infancy.
Conclusions This study demonstrates the presence of the cutaneous features of PXE in a genetically distinct disease, generalized arterial calcification of infancy, and thus expands the spectrum of PXE-related disorders.