Junko Ohnishi, M.D., Hideyuki Shiotani, M.D., Hiroshi Ueno, M.D., Naoyuki Fujita, M.D. and Kimio Matsunaga, M.D.

Abstract
A 24-year-old man was hospitalized for an investigation of cardiac enlargement. Serum hyaluronic acid was increased to 238 ng/ml. Echocardiogram showed pericardial effusion with an area of increased density adjacent to the antero-lateral wall of the left ventricle. A soft-tissue mass within the pericardial space was enhanced with gadolinium DTPA on magnetic resonance imaging. Open biopsy confirmed the presence of a malignant mesothelioma. Magnetic resonance imaging provided useful information regarding the tumor.
(Jpn Circ J 1996; 60: 898-900)

Key Words: Primary pericardial mesothelioma, MRI, Gd-DTPA

Mailing address: Junko Ohnishi, M.D., Division of Cardiology, Department of Medicine, Saiseikai Imperial Gift Foundation Inc., 5-1-1 Fujiwaradai-nakamachi, Kita-ku, Kobe 651-13, Japan