“…In the esophagus, the presence of mucous glands was reported in the early period of this century with considerable species variations [7], In man, the glands are detected early in the embryo [9]: their distribution in esophageal glands proper and in esophageal cardiac glands is well established [1,3,7,16], as well as the large individual variations of their number [1]. The study of mucosubstances in these cells was limited as for now to very short re ports: positivity of the mucicarmine reaction [1], and presence of sulfate esters [5], This work illustrates the presence of sialo-and sulfomucins in the esophageal glands proper and at the esophagogastric junction in the eso phageal cardiac glands.…”