We did not observe any reactivity of CD98 in nasopharyngealtonsil epithelium and lymphoid cells of either nasopharyngeal or palatine tonsils.
2
Likewise, infected cells were found in lymphoepithelium and not respiratory epithelium of nasopharyngealtonsils or adenoids.
3
Putative M cells, mainly characterized by apical microvilli or microfolds and a close association with lymphoid cells, seem manifestly present on the nasopharyngealtonsils.