the results of this investigation showed : ( a ) that 94 % of patients with gross endoscopic lesions have an abnormal esophageal potential difference , ( b ) that an abnormal esophageal potential difference ( found in only 1 of 24 patients with normal mucosa ) is highly specific for the presence of esophageal mucosal disease , ( c ) that the type of potential difference abnormality may suggest the nature of the mucosal abnormality , for example high potential difference with barrett 's esophagus and low potential difference with esophagitis or invasive carcinoma , and ( d ) that while an abnormal esophageal potential difference is highly sensitive for detecting gross esophagitis ( 38 of 40 patients ) , it is less sensitive for diagnosing microscopic esophagitis ( 8 of 16 patients ) .
C0004763
barrett 's
C0014868
esophagitis