<prompt> Cardiac myxoma most common seen in ?Right AtriumRight VentricleLeft AtriumLeft Ventricle  <response>: Ans. is c i.e., Left AtriumCardiac myxomasMost common primary tumor of the adult hea.Benign neoplasms thought to arise from primitive multipotentmesenchymal cells.Familial syndromes associated with myxomas have activating mutations in the GNAS1 gene, encoding a subunit of G protein Gsa in association with McCune-Albright syndrome or null mutations in PRKAR1A, encoding a regulatory subunit of a cyclic-AMP- dependent protein kinase Carney complex.About 90 of myxomas arise in the atria, with a left-to-right ratio of approximately 4 : 1. 