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Since it has been recognized as a separate disease during the Korean war hemorrhagic fever with renal syndrome (HFRS) has often been discovered among the members of different armies in various countries, military personnel being the highest risk group for the disease. In the period from March to May 1999 we treated 6 soldiers coming from the military formation stationed at Kosovo and Metohia. The reaction of indirect hemagglutination test proved the presence of antibodies against Hantavira in each of them. They were infected during the stay in a dugout in the area with great population of field rodents. Only one patient was slightly ill, on the admission to the hospitalall. The others had severe clinical and laboratory findings: several days lasting fever, strong abdominal pain, as well as the pain in the loins dyspeptical discomfort, manifold increased blood urea nitrogen and serum creatinine values, thrombocytopenia, etc. Oliguria occurred in 4 patients. Hemorrhagic manifestations were slight (epistaxis, petechial rash conjunctival injection), or absent. Because of the aggravation of the acute renal failure, hemodialysis was performed in 3 patients, while other 3 underwent conservative treatment. Two of the patients had severe anemia because of which transfusions of erythrocytes and plasma were performed. Complications occurred in 2 patients (convulsive crises and lung infections). All patients recovered completely.

Introduction. Cystic renal lesions are very heterogeneous lesions which differ in ethiopathogenesis, morphological and clinical manifestations, and also in evolution and therapy. Classification of cystic lesions is complex, symptomatology is poor, and diagnosis is based on complete radiological diagnostic procedures. Case report. We presented a 20-year old patient with mild subjective symptoms. Objectively, he was without positive clinical signs and changes in biochemistry of blood. Using ultrasonography (US) multiple serous simple cysts were found in both kidneys. Using computed tomography (CT) multiple serous cysts were found, without changes in cystic walls, with preserved renal parenchyma and without cystic changes on other parenchymatous organs. Conclusion. Although renal cystic lesions are frequent in adult population, this is a rare example of a young adult man with simple, gigantic, serous cysts which do not produce clinical manifestations nor functional renal difficulty so far.