The subpulmonic pleural effusion: sonographic aspects.
A pleural effusion might be missed on an ultrasound examination if it is done only with the patient in a supine position. Ultrasound should be done sitting or standing to rule out pleural effusions. A patient is presented who had a subpulmonic pleural effusion on a chest radiography. The effusion was not visualized on supine sonography but was clearly visualized with the patient upright.
D000328:Adult; D005260:Female; D006801:Humans; D010996:Pleural Effusion / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011187:Posture; D011859:Radiography; D014463:Ultrasonography