“…However, smaller or larger areas may be covered with columnar epithelium. This condition has been described by a number of authors (Schridde, 1904;Berdal, 1949;Bosher and Taylor, 1951;Raeburn, 1951;Thomas, Rappoport and Keogh, 1954;Wyndham, 1956;Barrett, 1957;Tchertkoff and Lee, 1962;Law and Sheehan, 1965;Gemsenjager, 1966;Henrot, Nandrup, Auriat, and Guionie, 1969), and will probably give no symptoms unless pathological changes are present in the ectopic mucosa.…”