The low power microscopic appearance of an aneurysmal bone cyst is seen here. Cavernous spaces are filled with blood. The walls of the spaces contain spindle cells and multinucleated cells.

• 低倍镜显示动脉瘤性骨囊肿。海绵状腔隙充满着血。腔壁包含梭形细胞与多核细胞。