Abstract
The fine structure of the human nasal and paranasal sinus glands was observed under electron microscopy. There is apparently no such documentation.
The materials were obtained during operative procedures of the nasal and paranasal sinuses.
The excretory duct of nasal and paranasal glands can be distinguished as three portions, i. e. ductal, striated and intercalated.
Mucous and serous or mixed secretory glands are in various phases of secretory function.
Occasionally, oncocytes are observed in the ductal, striated, intercalated and acinar portions. Electron microscopy shows clearly that the cell has cytoplasm which is filled with numerous mitochondria, and such does not differ from that observed in salivary glands. It is considered that such originate from the transformed cells of both of the acinar and excretory duct epithelium.
