Tumors in the region of the foramen magnum.
D005539:Foramen Magnum; D006801:Humans; D009103:Multiple Sclerosis / Q000175:diagnosis*; D009369:Neoplasms; D013118:Spinal Cord Diseases; D013125:Spinal Neoplasms; D013127:Spinal Nerves
MULTIPLE SCLEROSIS/diagnosis; SPINAL CORD/diseases; SPINAL NERVES/neoplasms