A text-book of diseases of the nose and throat (1904)
Kyle, David Braden, 1863-1916 · Philadelphia ; New York ; London : W.B. Saunders · leaf 28
f small orifices, the ostia eth-moidalia, into the canal leading from the frontal sinus, or infun-dibulum, which in turn opens into the middle meatus at the hiatussemilunaris in its extreme anterior part. In some cases these cells communicate with the frontal sinuses,and rarely may also open into… … Fig. 6.—Maxillary and infra-orbital si-nuses (after Cryer): m.s., maxillary sinus, withits anterolateral side laid off; i.o.s., infra-or-bital sinus, with a piece of paper passedthrough the infra-orbital foramen. The rootof a tooth is shown bare, having ulceratedinto the maxillary sinus. 22…
