233. Is 24-h pH measurement adequate to assess these patients?
T.R. DeMeester, P. Burdiles, HJ. Stein, S.E.A. Attwood (Los Angeles)

234. How does Barrett's mucosa heal?
Th.P.J. Hennessy (Dublin)

235. What are the histologic criteria that justify claiming the regression of Barrett's esophagus?
J.F. Fléjou (Paris)

236. In which instances is regression of Barrett's esophagus maintained during long-term follow-up?
M. Dei Poli, G. Gasparri (Turin)

237. What is the proportion of regression of esophagitis and motor disorders of CLE after antireflux surgery?
N.K. Altorki (New York)

238. Does suppression of reflux protect against subsequent malignant change?
R.E. Sampliner (Tucson)

239. Is brush cytology an acceptable alternative to endoscopic examination with biopsies in a surveillance program?
M. Schapiro (Los Angeles)

240. Should colonoscopy be routinely performed during follow-up for Barrett's esophagus?
S.J. Sontag (Hines)

241. What factors are involved in effective endoscopic monitoring?
M. Schapiro (Los Angeles)