A Y-shaped sphenoidal sinus septum: a case report

The sphenoidal sinus septum is one of the most important landmarks during endonasal endoscopic transsphenoidaloperations. During routine coronal sectioning of the face, we found a variant Y-shaped septum in the sphenoidalsinus of a female cadaver. This unusual septum was found between two sections (anterior and posterior sections) and locatedinferior to the pituitary gland. The sphenoid sinus was divided into three chambers by the septum, i.e., right, middle, and left. During endoscopic surgery, surgeons should be aware of these variations. To our knowledge, this report documents the firstY-shaped septum of the sphenoidal sinus. Such information can be helpful for surgeons.