My sons test from his colonoscopy came back with mast cell counts of 27-40/HPF and has been diagnosed with mast cell activation syndrome. Are these numbers high or low? Just want the opinions of others. It's interesting as they were able to take his colonoscopy test that he took 2 years ago and test the slides this week and came up with this result. Who know that a test from 2 years ago could show results today.