Leiomyosarcoma with Mass Effect on the Left Atrium Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net Metastatic leiomyosarcoma unknown primary with impingement on the left atriumAshley Davidoff MD TheCommonVein.net