Moore et al divided angiodysplasia and arteriovenous malformations of the gastrointestinal tract into 3 types based upon the distribution of the lesions and clinical findings. The authors are from the University of Michigan.
Clinical Features
Location of Malformations
Type
adult >= 55 years of age
right side of colon (cecum, ascending colon)
1
young adult (onset of symptoms before the age of 50)
stomach or proximal small intestine
2
any age, family history, spontaneous epistaxis
proximal GI tract; telangiectasia of skin in face and fingers; mucosal telangiectasia in the mouth and nares
3
where:
• Type 3 = hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu Syndrome)
• These lesions are distinct from hemangiomas of the GI tract.
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