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Sagittal T2-weight MRI (A) and FLAIR image (B) demonstrating abnormalities from pons to medulla oblongata. C : Sagittal contrast enhanced imaging demonstrating abnormal enhancing lesions located at pontobulbar junction, dorsal oblongata and craniocervical junction. D : Sagittal cervical T2-weight MRI demonstrating abnormal flow void (arrow) at ventral surface from craniocervical junction to cervical cord.
