Patients may experience abdominal pain, diarrhea, nausea, vomiting, loss of appetite and weight, intestinal obstruction, and intestinal bleeding
If you are unsure what type of rash you are dealing with, comparing the timeline and progression can help narrow down the cause
Fang et al, 2019
The effluent was ionized via ion electrospray in negative mode on a TSQ Quantiva triple-quadrupole mass spectrometry with the following instrument settings: ion spray voltage 2500 V, sheath gas 28, ion transfer tube temperature 325, aux gas 8, and FWHM of 0.7 for both Q1/Q3 resolution
A recent study in patients with HT + MCAS presenting with chronic symptoms indicated that urinary N -methyl histamine and PGD2 metabolites were not elevated at times when they were not actively presenting symptoms of MCA compared to patients with mastocytosis, who present with elevated baseline levels