I'm not familiar with the term, "centriest" @panorman3. Perhaps the term is "mesentery"? The mesentery is in the location you described earlier. If so, here is a discussion about NETs in the mesentery.
https://connect.mayoclinic.org/discussion/nets-mesentery-small-bowel-resection-lanreotide-octreotide-story/
I hope you will find some helpful information in the discussion.