Germline pathogenic variant in PIK3CA leading to symmetrical overgrowth with marked macrocephaly and mild global developmental delay

Abstract excerpt

BACKGROUND: Activating pathogenic variants in PIK3CA gene usually occur at a mosaic status and underlie a variety of segmental overgrowth phenotypes. Germline variants in PIK3CA have been rarely reported, described in a total of 12 patients with macrocephaly to date. Clinical and prognostic features of these germline variants have not been described in detail yet. METHODS: Targeted deep sequencing by custom panel...

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