Medical College of Wisconsin
CTSICores SearchResearch InformaticsREDCap

Analyzing the Genetic Spectrum of Vascular Anomalies with Overgrowth via Cancer Genomics. J Invest Dermatol 2018 Apr;138(4):957-967 PMID: 29174369

Pubmed ID

29174369

Abstract

Vascular anomalies are variably associated with overgrowth, skeletal anomalies, and abnormalities of the brain, leptomeninges, and eye. We assembled a 16-institution network to determine the range of genetic variants associated with a spectrum of vascular anomalies with overgrowth, ranging from mild to severe. Because of the overlap between cancer-associated variants and previously described somatic variants in vascular overgrowth syndromes, we employed tumor genetic profiling via high-depth next-generation sequencing using a panel to assay affected tissue from a diverse cohort of subjects with vascular anomalies with overgrowth. Seventy-five percent (43/57) harbored pathogenic or likely pathogenic variants in 10 genes. We identified two genes (mTOR, PIK3R1) and several variants previously described in the setting of cancer but that, to our knowledge, have not been described in vascular malformations. All were identified at low variant allele frequency consistent with somatic mosaic etiology. By leveraging somatic variant detection technology typically applied to cancer in a cohort inclusive of broad phenotypic severity, we demonstrated that most vascular anomalies with overgrowth harbor postzygotic gain-of-function mutations in oncogenes. Furthermore, continued interrogation of oncogenes in benign developmental disorders could provide insight into fundamental mechanisms regulating cell growth.

Author List

Siegel DH, Cottrell CE, Streicher JL, Schilter KF, Basel DG, Baselga E, Burrows PE, Ciliberto HM, Vigh-Conrad KA, Eichenfield LF, Holland KE, Hogeling M, Jensen JN, Kelly ME, Kim W, King DM, McCuaig C, Mueller KA, Pope E, Powell J, Price H, Steiner JE, Frieden IJ, Tollefson MM, Drolet BA

Authors

Donald Basel MD Chief, Associate Professor in the Pediatrics department at Medical College of Wisconsin
Beth A. Drolet MD Professor in the Dermatology department at Medical College of Wisconsin
Kristen E. Holland MD Associate Professor in the Dermatology department at Medical College of Wisconsin
John N. Jensen MD Associate Professor in the Plastic Surgery department at Medical College of Wisconsin
David M. King MD Chair, Professor in the Orthopaedic Surgery department at Medical College of Wisconsin
Dawn Siegel MD Associate Professor in the Dermatology department at Medical College of Wisconsin




jenkins-FCD Prod-299 9ef562391eceb2b8f95265c767fbba1ce5a52fd6