Fig. 4.
Labial glands removed as a whole, clinically diagnosed as nodules or granulomas after a filling procedure. A.and B.Haematoxylin and eosin (HE). C.Periodic Acid-Schiff (P.A.S.), mucus-secreting areas (arrows), serous areas (arrow heads). D.Alcian blue, serous cells (S), mucous cells (M)