sinus septum

si·nus sep·tum

a small fold forming the medial end of the valve of the inferior vena cava; it is developed from the dorsal wall of the embryonic sinus venosus.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The sphenoidal sinus septum is a significant surgical landmark when endoscopic endonasal transsphenoidal approaches are performed, as it may attach to crucial structures such as the optic canal and internal carotid artery (Chong et al., 1998; Unal et al., 2006; Idowu et al., 2009; Kapur et al.; Awadalla et al., 2015).
According to some authors, the sphenoidal sinus septum is commonly found deviating to the right or to the left and rarely found located in the center or midline (Tan & Ong; Fasunla et al.).
The sphenoid sinus septum (SSS) is pushed across to the left side and the eroded clivus (C).
The cavity in the left frontal sinus was evaluated using 70-degree endoscope because of the defect in the frontal sinus septum, the internal part of the sinus was irrigated and aspirated.
The detailed knowledge of anatomical variations of sphenoid sinus septum as well as its relationship with the surrounding structures like optic nerve, internal carotid artery, cavernous sinus and pituitary gland using computed tomography is paramount for endoscopic sinus surgery and endoscopic skull base surgery including trans-sphenoidal approach or para sellar area.
This cell represents pneumatisation of the inter-frontal sinus septum; when extensive, such pneumatization can extend into the crista galli.
A partial anterior septectomy was performed and extended superiorly to the interfrontal sinus septum that had been eroded by tumor.