Fig. 7From: Spinal neurenteric cyst in a dogPhotomicrographs showing the secretory function of the epithelium. Periodic acid-Schiff staining is positive (a), and highlights acidophil granules in the cytoplasm of caliciform cells with a basal nucleus and convex borders (b). Alcian blue staining is also positive, highlighting production of acid mucin (c)Back to article page