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DOI: 10.1177/1466424008089796 © 2008 Royal Society for the Promotion of Health Lessons to be learned: a case study approach — acute appendicitis masquerading as macroamylasaemiaRoyal Glamorgan Hospital, Llantrisant CF72 8TG, United Kingdom, dr_ganeshm@yahoo. com
Gastroenterologist and Physician, West Wales General Hospital, Carmarthen SA31 2AF, United Kingdom Macroamylasaemia is a condition in which serum amylase is elevated in the presence of a low to normal urinary amylase and normal renal function. It is rare but can masquerade as other clinical disorders. Discussed here is a case report of a patient who presented initially with abdominal pain (later recognized as being due to gangrenous appendicitis) and in whom there was a very high serum amylase level, leading to an erroneous initial diagnosis and management as acute pancreatitis. The CT scan of the abdomen was normal without any evidence of pancreatitis. Subsequently, the renal amylase:creatinine clearance ratio (Cam/Ccr) was found to be low, being characteristic and diagnostic of macroamylasaemia; the latter was, in turn, the cause for the elevated serum amylase level. The underlying macroamylasaemia had thus masqueraded as pancreatitis. The patient underwent appendicectomy and hence made an excellent recovery. It is vitally important to recognize this condition in order to avoid both an incorrect diagnosis and inappropriate treatment/management.
Key Words: abdominal scan computerized tomography (CT) macroamylasaemia renal amylase creatinine clearance ratio (Cam/Ccr)
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