Anomalies.
—Dees1 states that developmental anomaly of the kidney or the ureter is of clinical importance and that it occurred among 9.6 per cent of 1,410 consecutive patients for whom pyelograms had been made.Renal anomaly accounts for much more than 9.6 per cent of diseases of the upper part of the urinary tract.Symptoms of anomaly of the upper part of the urinary tract usually begin when the patients are between the ages of puberty and 35 years.Of 135 patients who had renal anomaly, the anomaly was the definite cause of symptoms among 100; it was asymptomatic among 25 and was a questionable cause of symptoms among 10.Infection was present in 50 per cent of the patients who had renal anomaly; calculus was present in 20 per cent and obstruction in 43.5 per cent.The chief complaint of 62.2 per cent of the patients was