<prompt> Most common site of Hydatid cyst in human body is:-SpleenRight postero-superior lobe of liverRight antero-inferior lobe of liverLeft lobe of liver  <response>: Hydatid disease: Caused by infection with a small tapeworm parasite called Echinococcus granulosus. Most common site of hydatid cyst in human body is Right postero-superior lobe of liver. In hydatid disease, 70 of cysts are located in right lobe of liver. Rest are located in lungs, brain, peritoneum, long bones and kidney. 