Cancers, Vol. 11, Pages 1031: GNAQ Q209R Mutations Are Highly Specific for Circumscribed Choroidal Hemangioma

Cancers, Vol. 11, Pages 1031: GNAQ Q209R Mutations Are Highly Specific for Circumscribed Choroidal Hemangioma Cancers doi: 10.3390/cancers11071031 Authors: Le Guin Metz Kreis Bechrakis Bornfeld Zeschnigk Lohmann Several tumors, including uveal melanoma, show somatic mutations of GNAQ/GNA11. Circumscribed choroidal hemangioma is a benign tumor that becomes symptomatic in adulthood. In some patients, morphologic examination of biopsies is required for differential diagnosis between amelanotic choroidal melanoma and circumscribed choroidal hemangioma. Here, we report the results of GNAQ/GNA11 mutation analysis in samples from circumscribed choroidal hemangioma. Deep amplicon sequencing (Illumina MiSeq, San Diego, CA, USA) of positions R183 and Q209 of GNAQ and GNA11 in tissue samples from 33 patients with histologically diagnosed circumscribed choroidal hemangioma. All patients underwent biopsy or enucleation at our clinic between 2008 and 2018. To enable detection of variant alleles at low fractions, read depth exceeded 15,000-fold. DNA for genetic analysis was prepared from either snap-frozen (n = 22) or FFPE (n = 11) tissue samples. Samples from 28/33 patients (85%) showed a somatic missense mutation of GNAQ (c.626 A > G) predicted to result in p.Q209R. Variant allele fraction was variable (range 2.3% to 28%). Variants of GNAQ resulting in p.Q209 are characteristic for circumscribed choroidal hemangiomas. It appears that the GNAQ mutation...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research