A 78 year old man was admitted complaining of cough and sputum. Percutaneous needle biopsy identified a right middle lobe mass as squamous cell carcinoma of the lung. Magnetic resonance imaging (MRI) seemed to show that the tumour in the right middle lobe extended continuously into the left atrium via the right pulmonary vein. Transoesophageal echocardiography (TOE) showed that the atrial mass was polyp-like in shape (about 2.5 cm in diameter) with a centralised low echo area, an irregular surface, and a stalk …