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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2015 June;174(6):303-5

Copyright © 2015 EDIZIONI MINERVA MEDICA

Obstructive uropathy by ureteropelvic joint obstruction secondary to primary renal hydatid cyst

Molina R., Redón L., Páez A.

Department of Urology, Fuenlabrada Universitary Hospital, Madrid, Spain


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Hydatid disease is produced by the parasite Echinococcus granulosus whose main location is the liver, being exceptional isolated renal involvement. We report the case of primary renal hydatid cyst that produced obstructive uropathy due to stenosis of the ureteropelvic junction. A 63-year-old male was diagnosed by ultrasound and intravenous urography of right obstructive uropathy. An abdominopelvic CT was performed and showed a polylobulated mass in contact with the renal parenchyma and proximal right ureter which produced obstruction of the ureteropelvic junction. The patient underwent transperitoneal laparoscopic resection of the mass. Intraoperatively the lesion was solid and depending on the renal parenchyma, contacting the renal sinus and the ureteropelvic junction and a radical nephrectomy was performed for suspected renal cancer. The histopathologic study revealed the presence of a renal calcified hydatid cyst which collapse pyeloureteral junction that produced pyelocalyceal dilation and chronic obstructive pyelonephritis. Renal hydatid cyst is a rare manifestation of the disease, which can be considered in the differential diagnosis of renal masses and extraluminal causes of obstructive uropathy, in countries where the disease is endemic, being ideally conservative and laparoscopic surgery, the treatment of choice.

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