NM_000314.8(PTEN):c.49C>G (p.Gln17Glu) is currently classified as a variant of uncertain significance for PTEN Hamartoma Tumor syndrome in an autosomal dominant manner using modified ACMG criteria (ACMG Classification Rules Specified for PTEN Variant Curation version 3.0.0). Please see a summary of the rules and criteria codes in the “PTEN ACMG Specifications Summary” document (assertion method column). PM6: Assumed de novo, but without confirmation of paternity and maternity in a patient with the disease and no family history. (internal laboratory contributor) PS3_P: Other studies demonstrating lipid phosphatase activity <50% of wild-type or abnormal in vitro cellular assay or transgenic model with phenotype different from wild-type that does not meet PS3_moderate. (PMIDs: 24292679, 29706633). PM2_P: Absent in gnomAD PP2: PTEN is defined by the PTEN Expert Panel as a gene that has a low rate of benign missense variation and where missense variants are a common mechanism of disease. BP4: REVEL score < 0.5 (score=0.498) Using the Bayesian point system (PMID: 29300386) for this variant with conflicting evidence: 1 benign supporting, 1 pathogenic moderate, 3 pathogenic supporting codes get -1 + 2 + (1*3) points; total is 4 (Uncertain significance).