Schematic drawings (left) and T2-weighted MR images (right) of AE lesions show (top–down) the five types in the Kodama classification: type 1 multiple small round cysts without a solid component; type 2 multiple small round cysts with a solid component; type 3 a solid component surrounding large and/or irregular cysts with multiple small round cysts; type 4 a solid component without cysts; type 5 a large cyst without a solid component.