Rounded

When looking at my MRI the NS kept saying it is rounded. What did she mean by this? My deviation is 7 mm and my symptoms have elevated since before I got my diagnosis of CM and NS set up second opinion since she has not seen a lot of my symptoms with Chiari. Go for CINE MRI tomorrow and second opinion on May 9. I have the head pressure everyday and dizziness makes me feel faint. My activity for the day intensifies symptoms does that happen to anyone else?