Abdominal pain is a common gastroenterological symptom with an extensive deferential diagnoses. Angioedema is an important cause to remember after the more common causes have been excluded.It is caused by a deficiency in the inhibitor of the first component of classical complement pathway and is divided into hereditary or acquired.Acquired angioedema is associated with autoimmune or lymphoproliferative neoplasms.The clinical features of both include recurrent,self-limiting and circumscribed edema affecting the subcutaneous tissue of the upper respiratory airways and gastrointestinal tract.
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