A Unique Presentation of Pulmonary Vein Thrombosis in a Patient With Rapidly Progressive Metastatic Pelvic Myxofibrosarcoma.

Pulmonary vein thrombosis (PVT) is an uncommon but often lethal disease with non-specific manifestations. Herein, we present a case of an elderly woman with a past medical history significant for limited-stage pelvic myxofibrosarcoma (MFS), who was admitted with subacute weakness and worsening dyspnea. Over the course of hospitalization, CT angiography was performed, which demonstrated a filling defect in the inferior left pulmonary vein consistent with PVT, in addition to evidence of widespread metastatic disease. The patient was offered therapeutic anticoagulation, but given the extent of her metastasis, the patient opted to transition to comfort care and pursued hospice care. This case serves as a unique presentation of a rare disease process associated with widespread metastatic MFS, illustrating the need for early recognition and treatment.