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A Novel PTCH1 Non-Canonical Splice Region Variant Associated with Gorlin Syndrome: A Case Report
Miriam J Smith1,2, Emily-Jayne Shell1,2, George J Burghel1,3
1Manchester Centre for Genomic Medicine, St Mary's Hospital, Manchester Foundation NHS Trust, Manchester Academic Health Sciences Centre (MAHSC), Manchester, UK.
Introduction:
Gorlin syndrome (GS) is a rare autosomal dominant condition that predisposes to cutaneous basal cell carcinomas, jaw keratocysts, and skeletal anomalies. Most patients with GS have a heterozygous pathogenic variant in the PTCH1 gene, although a minor subset have a pathogenic variant in the SUFU gene.
Case Presentation:
We report a 34-year-old woman meeting clinical diagnostic criteria for GS and with an affected father who also meets diagnostic criteria. Both had a novel germline splice-region variant that was originally classified as a variant of uncertain significance.
Conclusion:
We used cDNA analysis to provide additional evidence to allow re-classification of the non-canonical splice variant and provide a formal genetic diagnosis that can also be used for family planning and to screen at-risk relatives.
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