1. Thoracolithiasis;Kosaka;Japanese J Thorac Cardiovasc Surg,2000
2. Pleural stone a case report;Dias;J Thorac Cardiovasc Surg,1968
3. Thoracolithiasis 11 cases with a calcified intrapleural loose body;Kinoshita;J Thorac Imaging,2010
4. Thoracolithiasis—a mobile calcified nodule in the intrathoracic space: radiographic, CT and MRI findings;Tanaka;Radiat Med,2002
5. Surgically removed thoracolithiasis: report of two cases;Iwassaki;Ann Thorac Cardiovasc Surg,2006