Incidental Discovery of a Chronically Dissected Pulmonary Artery.

Pulmonary artery dissection is a rare and potentially fatal vascular emergency most often associated with pulmonary hypertension. In this report, we describe the incidental discovery of a chronically dissected pulmonary artery in a 92-year-old woman who presented to the emergency department with abdominal discomfort, constipation, and poor appetite. Imaging to evaluate for occult malignancy revealed a dissection flap within the main pulmonary artery and findings suggestive of chronicity. These radiographic findings included parenchymal scarring of the left lung, calcification, and collateralization of pulmonary vessels. Given the patient's age and lack of symptoms, no invasive treatment approach was pursued after multidisciplinary discussion. Classically considered a deadly disease, pulmonary artery dissection may not be as universally fatal as once thought and may present subclinically, remaining undetected for extended periods of time. Early recognition of atypical and indolent presentations is essential, especially in an era of widespread cross-sectional imaging and in patients for whom invasive intervention may not be appropriate.