INTRODUCTIONDelirium is an acute and transient brain dysfunction characterized by attention disorders, disturbance of consciousness levels, and changes in cognitive function, often with noticeable fluctuations. Postoperative delirium (POD) typically occurs within 24 to 72 hours after surgery.1 The incidence of delirium after vascular surgery ranges from 5% to 39%.2 However, delirium with unilateral pupil dilation has never been reported. The appearance of pupil dilation in patients with delirium brings serious difficulties to clinical diagnosis. Here, we report an unusual case of severe delirium with unilateral reversible pupil dilation after interventional thrombectomy of the lower extremity.

Right atrial appendage aneurysms (RAAAs) are extremely rare in cardiac anomaly. According to the literature, no more than 25 cases have been reported so far, among which only 3 cases were children. Here, we reported an infant with a giant RAAA and severe symptoms. The RAAA was diagnosed by echocardiography and surgically resected under cardiopulmonary bypass. The role of transesophageal echocardiography was very important during the aneurysm resection surgery, which helped surgeons to plan surgical procedures during the surgery and evaluate the surgical effect postoperatively.