[Urinary and nephrologic aspects of Von Recklinghausen disease. Two case reports and review of the literature].

Urinary tract involvement in neurofibromatosis type 1 is rare and uncommon entity. The syndrome is transmitted as an autosomal dominant trait and is characterized by cutaneous pigmentation and tumors as neural crest origin. Two cases of kidney involvement by Von rechlinghausen's disease with in one case a consequent hydronephrosis with arterial hypertension and in the second a nephrocalcinos without hyperparathyroidism are present. The literature of urogenital and nephrologic neurofibromatosis is reviewed. The authors suggest that the patient with neurofibromatosis be screened annually with medical history, physical examination, urinalysis and serum chemistry for tumors that affect the urinary particularly in children.