“…(usually attached to upper margin of stoma) PATHOGENESIS Stomal stenosis may arise because a granulomatous polyp develops at the stoma (Holinger, Novak, and Johnston, 1950;Pearce and Walsh, 1961 ;Atkins, 1964;Binns, 1964;Johnston et al, 1967;Cooper and Grillo, 1969;Grillo, 1969a). Such polyps usually develop at the superior margin of the stoma (Pearce and Walsh, 1961;Johnston et al, 1967), as illustrated in Fig.…”