Idiopathic pulmonary vein thrombosis treated with apixaban.

Pulmonary vein thrombosis (PVT) is a rare clinical finding that is potentially fatal and with an unknown incidence rate as known cases exist predominantly in case reports. We present the case of a 58-year-old female who reported sudden onset of chest pain, shortness of breath, and dyspnoea on exertion. A computed tomography (CT) pulmonary angiogram was negative for evidence of pulmonary embolism; however, it did demonstrate the evidence of thrombosis of the right lower lobe segmental pulmonary vein. She had no identifiable aetiologies for her PVT; therefore, she was diagnosed with idiopathic PVT and was treated successfully with apixaban. This case represents the 14th incidence of idiopathic PVT in the current body of medical literature and the first case of successful treatment with apixaban.