Fig. 2From: Surgical treatment for basilar invagination with irreducible atlantoaxial dislocation: transoral atlantoaxial reduction plate fixation vs occipitocervical fixationA 62-year-old man, diagnosed with basilar invagination with atlantoaxial dislocation, underwent an OF surgery. Preoperative images of cervical lateral radiographs (a), sagittal CT scan (b), and sagittal MRI (c) showed evidence of basilar invagination with atlantoaxial dislocation and compression on the ventral. Cervical lateral radiographs (d, e) after an OF operation showed satisfactory location of internal fixation. Postoperative sagittal MRI (f) and sagittal CT scan (g) showed repositioning of atlantoaxial dislocation and alleviation of compression on the medulla. CT image (h) from the 6-month follow-up showed solid bone fusionBack to article page