Hi MJ,
Due to our bone structure being in 3D, unless we are perfectly positioned, often scan shots are asymmetrical but, that does not mean there’s an abnormality. On the other hand, if one of your vertebrae is subluxed (shifted laterally or rotated, or both) into the wrong position, this too can show up as asymmetry. It’s down to the radiologist to determine what is an anomaly and what isn’t. Often the same bone shown in a different view can rule in (or out) any such anomaly. I have to comment here though that anomalies in the cranio-cervical junction, with it being such a complex junction, are often missed! I’d need a much bigger picture and other views, from different angles, of that area.
Regarding the possible empty sella, it’s too difficult to determine from this view – photo too small and shade affected by the angle of the picture.
Can you do a ‘screen capture’ of the scan when it’s up on your computer screen and ‘paste’ it into a document in “Paint” or a similar application, then save it as a .jpeg file ? This produces a purer image. I might be able to comment further then.
Regards
Barbara
(UK)