myelogram

/ˈmaɪəloʊˌɡræm/
noun
  1. An X-ray or scan of the spinal canal taken after injecting a contrast dye, used to look for problems like herniated discs or tumors.
    • The doctor ordered a myelogram to see if the patient's back pain was caused by a pinched nerve.
    • During a myelogram, dye is injected into the spine to make the nerves show up clearly on the X-ray.
    • After the myelogram, the radiologist found a small tumor pressing on the spinal cord.