{Reference Type}: Case Reports {Title}: Ultrasonography of pericardial synovial sarcoma: A rare case report. {Author}: Cao X;Zhong X;Yu W;Xiong J; {Journal}: Asian J Surg {Volume}: 46 {Issue}: 12 {Year}: 2023 Dec 12 {Factor}: 2.808 {DOI}: 10.1016/j.asjsur.2023.08.215