EntityQ918118· pop 22· linked from 210 articlesfrontal sinusSign in to saveone of the four pairs of paranasal sinuses that are situated behind the brow ridgesConnectionspharynxEntitymastoid part of the temporal boneEntityforamen magnumEntitysuperciliary archEntitypterygoid processes of the sphenoidEntitysquamous part of occipital boneEntityparietal boneEntityethmoid boneEntitynasal cavityEntityhuman noseEntitysella turcicaEntityposterior nasal aperturesEntityexternal occipital protuberanceEntitysupraorbital arteryEntitysquamous part of frontal boneEntityLatinEntityInternational Standard Book NumberEntitynerveEntityskullEntitypublic domainEntityCategoriesBones of the head and neckOtorhinolaryngologyRhinologySinus surgery