A radiological aspect of segmental hypoplasia of the kidney was found on intravenous urography of eight patients. Urography was performed five times for arterial hypertension, two times for proteinuria and one time for pathological pregnancy. Aglomerular segmental hypoplasia was constantly observed on histological examination, and in three cases an important follicular ureteritis was found. Medical treatment and unilateral nephrectomy greatly improved clinical symptoms of six cases.