Fig. 5
From: Classification and microsurgical treatment of foramen magnum meningioma
The process of microsurgery of suboccipital midline approach. a The incision is performed strictly according to the median. b Cisterna magna and cerebellum are exposed. c Tumor is exposed. d Tumor bed is exposed after the tumor was removed. 1, the incision; 2, the arachnoid membrane of the cisterna magna; 3, cerebellum; 4, tumor; 5, tumor bed; 6, PICA; 7, the roots of the tumor; 8, brainstem; 9, vertebral artery