[Anatomopathologic and ultrastructural study of cardiac myxomas].

For clinicians, cardiac myxomas has been a diagnostic challenge. It may simulate a valvular disfunction. The present paper displays the morphologic aspects on 17 patients with the diagnosis of atrial myxoma. In 14 cases the tumor was located in the left atrium. In all the cases stellate shaped cells were seen within a myxoid matrix. The findings in this report support the idea that myxomas are tumors and not thrombi as it has been speculated in the literature. We also consider that the cell of origin of this neoplasm is a pluripotential cell which needs further studies.