The frequency of EE is not exactly known but the frequency in special population groups is suggested in clinical trials, but the number of patients in this study was too small to achieve statistical significance, but the results support the role of EE in the differential diagnosis of refractory GERD. The paper clarify the difference between GERD and refractory GERD without stress on EE patients as regard clinical findings this is because of little number of patients. The authors describe that rings and furrows are the most common endoscopic findings in EE patients while these findings were present in only 2 patients.