the results of the light microscopic , histochemical , immunocytochemical ( cytochrome c oxidase ) , and ultrastructural studies described here provide conclusive evidence that the swollen , granular , eosinophilic epithelial cells that compose ccp are true oncocytes that arise primarily , or perhaps exclusively , from the respiratory ( schneiderian ) epithelium of the sinonasal passages rather than from minor salivary glands .
C0334269
ccp
C0014609
epithelium