We diagnosed a case of primary cardiac lymphoma using transthoracic ne
edle biopsy. A 70-year-old man was admitted because of dyspnea. Magnet
ic resonance imaging revealed a tumor mass in the right ventricular fr
ee wall. We performed ultrasound guided transthoracic needle biopsy us
ing an 18-G needle, and diagnosed as malignant lymphoma by the biopsy
specimen. This method may be useful for the diagnosis of cardiac lymph
oma. (C) 1998 Elsevier Science Ireland Ltd.