Sholdice J A, McMillan D B
Gen Comp Endocrinol. 1985 Jan;57(1):135-49. doi: 10.1016/0016-6480(85)90210-2.
Large epidermal cysts that occur in the adenohypophysis of spawning lampreys develop as a consequence of destructive invasion of the parenchyma by an epithelium derived from the same anlage as the medial nasopharyngeal duct. The lumina of the cysts contain a carbohydrate-rich secretory material which is a mixture of epithelial mucins. An array of histochemical methods was used to show the kinship of the cysts with the mucin-secreting epidermis of the duct. These cysts appear to be unique to the cyclostomes and to have no obvious adaptive benefit.
在产卵七鳃鳗的腺垂体中出现的大型表皮囊肿，是由源自与鼻咽管内侧相同原基的上皮对实质进行破坏性侵袭而形成的。囊肿腔内含富含碳水化合物的分泌物质，该物质是上皮粘蛋白的混合物。一系列组织化学方法被用于显示这些囊肿与导管分泌粘蛋白的表皮之间的亲缘关系。这些囊肿似乎是圆口纲动物所特有的，且没有明显的适应性益处。
