title: Atypical myxoma.
abstract: We report the case of a 38-year-old woman with a large thin-walled cystic mass (6 x 5 x 4.5 cm) filled with arterial blood in the right atrium. The cystic mass with blood content was clearly delineated by transesophageal cross-sectional echocardiography and magnetic resonance imaging of the heart. At operation, a silver-whitish, smooth surfaced cystic mass was found attached to the free wall of the right atrium between the superior vena cava and the right atrial appendage with a broad base. Microscopically, the wall of the cyst was composed of stellate mesenchymal cells embedded within a myxoid matrix which was proved by alcian blue stain. To our knowledge, this type of cardiac myxoma has not been previously reported.
authors.affiliation: Department of Internal Medicine, National Taiwan University Hospital, Taipei, Republic of China.
authors.forename: J J
authors.initials: JJ
authors.lastname: Hwang
authors.forename: W P
authors.initials: WP
authors.lastname: Lien
authors.forename: P
authors.initials: P
authors.lastname: Kuan
authors.forename: C R
authors.initials: CR
authors.lastname: Hung
authors.forename: S W
authors.initials: SW
authors.lastname: How
mesh_terms: D000328:Adult; D003560:Cysts / Q000473:pathology; D005260:Female; D006325:Heart Atria / Q000473:pathology; D006338:Heart Neoplasms / Q000473:pathology; D006801:Humans; D008648:Mesoderm / Q000473:pathology; D009232:Myxoma / Q000473:pathology