title: A cytochemical study on the salivary gland pleomorphic adenoma (mixed tumor) and the fetal and adult salivary gland.
abstract: We studied the pleomorphic adenoma of the salivary gland ultrastructurally and cytochemically [Mg2+-activated adenosine triphosphatase (Mg2+-ATPase)], compared it with normal human fetal and adult salivary glands, and evaluated the histogenesis of this tumor. In the adult salivary gland, reaction products shows Mg2+-ATPase activity were localized in the plasma membranes of myoepithelial cells adjacent to the acinar cells or intercalated duct cells. However, in the salivary gland of the 16-week fetus, they were seen along all adjoining plasma membranes of the cells of terminal buds and duct-like structures. The present case of pleomorphic adenoma comprised two histological components: solid and myxomatous areas. Reaction products were seen along adjoining plasma membranes of both light and dark cells in solid areas.
mesh_terms: D008949:Adenoma, Pleomorphic / Q000201:enzymology / Q000648:ultrastructure*; D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000328:Adult; D017301:Ca(2+) Mg(2+)-ATPase; D004848:Epithelium / Q000648:ultrastructure; D005260:Female; D005333:Fetus; D006801:Humans; D008854:Microscopy, Electron; D010306:Parotid Gland / Q000201:enzymology / Q000648:ultrastructure*; D011247:Pregnancy; D012468:Salivary Gland Neoplasms / Q000201:enzymology / Q000648:ultrastructure*; D013363:Submandibular Gland / Q000648:ultrastructure
chemical_list: D000251:Adenosine Triphosphatases; D017301:Ca(2+) Mg(2+)-ATPase