Which of the following statements about Atrial myxomas is true

Ref Harrison 19 th ed pg 1577; 289e-1 Pathologically, myxomas are gelatinous structures that consist of myxoma cells embedded in a stroma rich in glycosaminoglycans. Most are solitary, arise from the interatrial septum in the vicinity of the fossa ovalis (paicularly the left atrium), and are often peduncu- lated on a fibrovascular stalk.