Imaging examination revealed varied results: pleural effusion (5 cases), pulmonary infiltrates (4 cases), multiple lung nodules (2 cases), thick-walled cavity (1 case), sign of budding (1 case), ascites (1 case), pericardial effusion (a trace amount, 3 cases), mediastinal lymphadenectasis (4 cases), and retroperitoneal lymphadenectasis (2 cases).