Hereditary Hemorrhagic Telangiectasia. Also called Osler-Rendu-Weber syndrome, hereditary hemorrhagic telangiectasia is an inherited condition that causes malformations of blood capillaries that develop on the skin and mucous membranes. They may cause nose bleeds and iron deficiency anemia resulting from bleeding in the stomach or elsewhere in the gastrointestinal tract. Treatments are blood or iron replacement.
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