Thursday, March 3, 2011

Q: What is Fox's sign?

Answer: Fox's sign is ecchymotic patches seen over the inguinal ligament or the anterolateral surface of one or both thighs just below the inguinal ligament. The discoloration results from bloody fluid tracking extraperitoneally along the fascia of the psoas and iliacus muscles, becoming subcutaneous in the upper thigh. It occurs in patients with retroperitoneal bleeding, usually due to acute haemorrhagic pancreatitis. The sign is named after Dermatologist, Dr. Fox.


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