title: Hydronephrosis of the lower pole of the duplex kidney: another renal pseudotumor.
abstract: Obstruction and reflux occur fairly commonly in the duplex kidney. Although obstruction with attendant hydronephrosis is more frequently seen in the upper pole of a duplex system, a similar process involving the lower pole should be considered in the differential diagnosis of renal mass lesions. Four cases are described in which lower pole hydronephrosis simulated neoplasm.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging*; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014567:Urography