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Preoperative imaging examination. a Chest X-ray revealed a huge tumor in the left lung field. b Body surface echocardiography revealed a multifocal cystic tumor. c Contrast-enhanced CT on a close examination indicated a massive cystic lesion 20 cm in size occupying the left thoracic cavity, contiguous with the mediastinum. d Contrast-enhanced MRI revealed a multifocal cystic tumor with no evidence of invasion into surrounding tissues
