Neurofibromatosis (Von Recklinghausen's disease) is uninherited as an autosomal dominant trait. It is characterised by the development of tumors in diverse sites, which may be benign or malignant. The case of a 39 year old woman with Von Recklinghausen's disease is discussed. She presented with a 3 year history of episodes of melaena and iron deficient anaemia. Mesenteric angiography demonstrated a hypervascular tumour in the jejunum. It was surgically excised with an anatomopathological diagnosis of neurofibroma.