Frontal Sinuses Viewed in a Frontal Section of the Skull

Description

Anterior craniofacial anatomy appears in a frontal section through the male skull, opening the frontal sinuses within the frontal bone just superior to the nasal cavity and superomedial to the orbits. A median septum divides the right and left frontal sinuses, while the sinus walls relate inferiorly to the frontal recess region and posteriorly to the anterior cranial fossa. Inferior to the frontal bone, the nasal septum partitions the nasal cavity, and the superior, middle, and inferior nasal conchae project medially from the lateral nasal wall. Ethmoidal air cells occupy the region between the nasal cavity and orbit, with the sphenoid sinus positioned posterior and midline, and portions of the maxillary sinuses seen inferolateral to the nasal cavity above the maxillary dentition. Frontal sinus anatomy matters because it dictates drainage pathways and surgical risk, and this view makes the frontonasal outflow tract easy to conceptualize in relation to the ethmoid labyrinth. Endoscopic frontal sinusotomy (Draf procedures) hinges on recognizing the frontal recess boundaries and avoiding orbital penetration laterally or violation of the anterior cranial fossa superiorly, a known route to cerebrospinal fluid leak. Variable septation, asymmetry, or hypoplasia is common in adults and can explain unilateral opacification patterns on CT in chronic rhinosinusitis or after trauma. Use this asset in head and neck anatomy teaching to pair osteology with sinonasal mucosa and air cell relationships, or in ENT and radiology materials explaining osteomeatal complex obstruction and the spread of sinusitis to orbit or intracranial compartments. It also suits surgical atlases and consent education where frontal sinus variants, septa, and adjacent landmarks must be communicated without ambiguity. Anatomical accuracy verified by SciePro's Medical Advisory Board.