They can miss easily. Back in sept.- oct. I was suffering with a lot of neck and shoulder pain. The pain was radiating down my left arm mostly all the way to my wrist. They couldn't figure out what was wrong with me so I was sent for an MRI and shuffled along to a neurosurgeon. They did find a few bone spurs but they weren't touching anything. The neurosurgeon told me that she believed I was in pain but there was nothing in my MRI that could have caused it and pushed me off to physical therapy. They said I had trigger spots in my neck and shoulder muscles. I've also been having massive sinus issues and my ENT decided to put tubes in my ears. I've had a constant headache since that was done about 3 months ago. ENT ordered an MRI of my brain. Turns out I have tonsillar ectopia of 5mm. I decided to take a look at the MRI from October. My dangly brain was as plain as day and because it wasn't brought up in the results by the radiologist she completely missed it.