Patients with eosinophilic esophagitis have significantly higher serum levels of absolute eosinophil count, eosinophil-derived neurotoxin and eosinophil cationic protein, which correlate with esophageal eosinophilia levels, according to the results of a prospective cohort study.
http://www.healio.com/gastroenterology/esophagus/news/online/%7B16c3a163-c26e-4c5d-ae1e-91a5772cb271%7D/researchers-identify-potential-non-invasive-biomarkers-for-eoe
Researchers identify potential non-invasive biomarkers for EoE