Abstract
Introduction and objectives: Hydatid cyst/cystic echinococcosis is a parasitic infection caused by the larval stages of echinococcus granulosus .Denitive hosts are wild and domestic canine.Humans are aberrant intermediate hosts .2-4 % of such cases have Renal involvement. Isolated Kidney involvement is extremely rare (1.9%) and can mimic cystic RCC clinically and radiologically. Herein we discuss how to differentiate between Hydatid cyst and RCC and the management thereafter. Methods: Patient based in Tamil Nadu was admitted and worked up using various imaging tools such as USG, CT Scan and nally nephrectomy was done for histopathological analysis of the sample to conrm the diagnosis. Results: Based on past evidences and in the present patient, nephrectomy has to be carried to conrm and differentiate between the differential diagnosis of Cystic RCC and Isolated Renal Hydatid Cyst. Histopathological analysis of the specimen conrmed the same In spite of Conclusion: characteristic picture of cystic Echinococcosis on imaging isolated renal hydatid cyst is a very rare lesion and hence maybe misdiagnosed as a renal tumor. It should be considered a renal tumor until proven otherwise. Nephron sparing surgery is the primary treatment for isolated Renal Hydatid Cyst but Nephrectomy is warranted preoperatively misdiagnosed large cystic lesions and high grade lesions and for lesions involving collecting system.
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