Is it possible to get a false negative on the biopsy for EE due to prolonged use of Steroid treatment? The reason I ask this question, is in April 2011, after being on fairly high dose prednisone for 5 months and inhaled steriods, I had my endoscopy with biopsy for EE. The results came back negative at that time. Over time the symptoms all returned and by September EE is being discussed again as a possibility. Thanks for your help. And best of luck to each of you.