PMC3307245_01
(a) T1-weighted axial MRI of the craniocervical junction at the level of the foramen magnum shows considerable cord compression due to a lesion (arrow) on the right side of the occipital bone. (b) 3D reconstructed CT scan at the same level confirms the bony nature of the lesion (arrow). (c) The tumor contains both membranous and cortical bone. (d) CT myelography at the level of the foramen magnum also shows cord impingement by the tumor. (e) Postoperative CT scan depicting the extent of resection. (f) Pathology confirmed the lesion as an osteochondroma
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F1
The tumor created significant compression of the cervicomedullary junction [Figure 1a]. 3D bone computed tomography (CT) scan confirmed the lesion to arise from right suboccipital bone containing both cortical and cancellous elements [Figure 1b and c]. On CT myelography, cord compression was apparent [Figure 1d]. Postoperative CT scan confirmed removal of the lesion [Figure 1e].