Tags: Anatomical Structure, Vein.
The intercavernous sinuses are two in number an anterior and a posterior and connect the two cavernous sinuses across the middle line. The anterior passes in front of the hypophysis cerebri the posterior behind it and they form with the cavernous sinuses a venous circle (circular sinus) around the hypophysis. The anterior one is usually the larger of the two and one or other is occasionally absent.
