Objective: To evaluate the efficacy of Extracorporeal shock wave litho
tripsy (ESWL) in renal anomalies. Material and Methods: From 1991 to M
ay 1995, 53 patients with calculi in anomalous kidneys presented to ou
r clinic for treatment with ESWL. Average patient age was 39 years, a
range of 6-66 years. These patients (32 male and 21 female) underwent
ESWL treatments. ESWL was performed in 27 patients with urolithiasis i
n duplex system, 18 with horse-shoe kidneys, 4 with unilateral renal a
genesis, 2 with pelvic ectopic kidneys, 1 with sigmoid kidney and 1 wi
th L-shaped kidney. Results: Among patients who completed ESWL the rat
e free of stones was 60.4% and the rate of clinically insignificant re
sidual fragments was 30.2%. No sign of stone disintegration was observ
ed in 2 patients. They underwent open surgery. The shock waves per the
rapy varied between 811 and 18,101. Double-J stents were placed in 13
patients. Conclusion: Most patients with calculi in anomalous kidneys
can be managed primarily with ESWL.