Blumberg sign

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Blumberg's sign is a sign that is elicited during physical examination in medicine. It is indicative of peritonitis.

The abdominal wall is compressed slowly and then rapidly released. Presence of pain makes the sign positive. It is very similar to rebound tenderness and might be regarded by some authors as the same thing, or at least a particular application of it.

The name comes from German surgeon Jacob Moritz Blumberg.