abstract hydatid cysts are endemic hooknoses in iran. it may involve various organs of body. liver is involved in 80% and lung in 10- 15%of cases. 25% of pulmonary hydatid cyst is bilateral. before any transplantations eradication of infection is necessary. in a 26-year old man with renal failure referred for kidney transplantation. on initial preoperative evaluation of this patient hydatid cys...