Hi @fabiof - as you mentioned you have a diagnosis of mesenteritis, also called sclerosing mesenteritis, which belongs to a spectrum of rare diseases, I moved your post here to where you could connect with others talking about this condition such as @peterose @bluecars2 @aksandralynn @sdrussett1 and others who may know about this disease and how it may affect the left upper quadrant of the abdomen as you have mentioned, offering their empathy and what may have been helpful for them.

Some of the members in this discussion also may be familiar with the concomitant aneurysmal dissection of the superior mesenteric artery and the celiac artery you described, and I would ask them to share about that, if so.

Are you experiencing bothersome symptoms at this time, fabiof?