Of thirty-nine patients with Klippel-Feil syndrome, twenty-five (64 per
cent) had significant genitourinary-tract anomalies demonstrated by
intravenous urogram and physical examination. The incidence of these
anomalies in Feil's three types of the syndrome was essentially the same,
unilateral renal agenesis being the most common. A routine intravenous
urogram is indicated in patients with this syndrome.