What is colliers sign?

Collier's sign refers to a medical sign observed during the examination of the abdomen of patients with an abdominal aortic aneurysm (AAA). It is characterized by the presence of a visible pulsation or a palpable thrill in the epigastric region, above the umbilicus. The sign is attributed to the expansion of the aneurysmal sac, which causes the pulsation of blood vessels near the skin surface. Collier's sign is named after American surgeon Peter Collier, who first described this phenomenon in the late 19th century. The sign is highly specific for AAA, and its presence warrants further diagnostic imaging to confirm the diagnosis and plan appropriate treatment. If left untreated, AAA can lead to life-threatening complications, such as rupture, internal bleeding, and shock. Hence, early detection and management of AAA are crucial to ensure better outcomes and prevent mortality.