Table of figure:
Fig 1 : 2D transthorachic echocardiography images and 3D reconstruction of the left atrial mass.
Fig 2 : CT based 3D virtual reconstruction of the mass performed using MIMICS software showing the extremely irregular borders and a narrow implantation stalk on the fossa ovalis.
Fig.3 : A,B,C: morphologic features of the lesion. Whole-mount section of myxoma, with villous surface and a superficial fibrinous cap (arrows) containing lymphoid aggregates (A, haematoxilin-eosin). The myxoma is made up of translucent loose matrix, containing scattered stellate cells (asterisk). The lymphoid cells embedded in fibrinous material (arrowhead) are large-sized and atypical (B, C, inset, haematoxilin-eosin). D, E, F: : Immunophenotypic features of fibrin-associated diffuse large B-cell lymphoma. The atypical lymphoid cells have a B-cell phenotype, being positive for CD20 (A) and PAX5 (B), are diffusely positive for EBV/EBER (C) and have a high Ki67 proliferation index (D), in contrast to the myxoma cells (D, upper half) which are almost completely negative for Ki67.