<prompt> Cystic blood filled spaces of variable size in the liver lined by endothelial cells is know as:Peliosis hepatisHemangioma liverHepatic adenomaRegenerative nodules  <response>: Peliosis hepatis is characterized by the presence of cystic, blood-filled spaces of variable size in the liver. Endothelial cells cover the internal surface of these cavities, and adjacent hepatocytes are normal. Ref: World J Gastroenterol 2006 June 14; 1222: 3612-3615. 