Fig. 2

a–g Left atrial myxoma. a In situ photograph of the myxoma at the time of surgery consisting of a complex papillary structure comprising grape-like clusters organized into an arborizing network. b Photograph of the excised atrial myxoma consisting of a tree-like structure with several arborizing branches. c Six micron section of the myxoma whole mount illustrating the arborizing network of grape-like clusters converging on a fibrous stalk. d, e Low (d) and high (e) power images illustrating lepidic cells lining the surfaces (d) and cells in a myxoid matrix forming abortive clusters of vessel-like structures (e). f, g Intermediate (f) and high (g) power images of occasional clusters of rounded cells at and near the surfaces displaying a lack of cohesion, forming small groups of cells separating from the surfaces of the myxoma