Cystic blood filled spaces of variable size in the liver lined by endothelial cells is know as:
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; 12(22): 3612-3615.
Peliosis hepatis
Hemangioma liver
Hepatic adenoma
Regenerative nodules