The inferior petrosal sinus is where the pituitary gland drains.

Inferior petrosal sinus sampling is a relatively new approach to the diagnosis of Cushing's disease.

The inferior petrosal sinuses, within the human head, are beneath the brain and allow blood to drain from the center of the head.

On the lateral margins of this surface are faint grooves for the inferior petrosal sinuses.

The anterior compartment transmits the inferior petrosal sinus.

Also an inferior petrosal sinus enters the sigmoid sinus near the jugular foramen.

The inferior petrosal sulcus is the groove containing the inferior petrosal sinus.

The junction of the inferior petrosal sinus with the internal jugular vein takes place on the lateral aspect of the nerves.

Equivocal results should be followed by a CRH stimulation test, with Inferior petrosal sinus sampling.

A more accurate but invasive test used to differentiate pituitary from ectopic or adrenal cushing's syndrome is inferior petrosal sinus sampling.

Its medial half is marked by a sulcus, which forms, with a corresponding sulcus on the occipital bone, the channel for the inferior petrosal sinus.

The cavernous sinus drains by two channels, the superior and inferior petrosal sinuses, ultimately into the internal jugular vein via the sigmoid sinus.

The inferior petrosal sinus receives the internal auditory veins and also veins from the medulla oblongata, pons, and under surface of the cerebellum.

On both sides and at the base of the brain, the inferior petrosal sinus and the sigmoid sinus do not join to form the internal jugular vein.

Dorello's Canal is the bow-shaped bony enclosure surrounding the abducens nerve and the inferior petrosal sinus as the two structures merge with the cavernous sinus.

The inferior petrosal sinus is situated in the inferior petrosal sulcus, formed by the junction of the petrous part of the temporal bone with the basilar part of the occipital bone.

Near the base of the skull they unite, and form two or three small trunks, which communicate with the vertebral veins, and then end in the inferior cerebellar veins, or in the inferior petrosal sinuses.

The smaller, anteromedial, "pars nervosa" compartment contains CN IX, Jacobson nerve (or the tympanic nerve, a branch of CN IX), and receives the venous return from inferior petrosal sinus.

The basilar plexus (transverse or basilar sinus) consists of several interlacing venous channels between the layers of the dura mater over the basilar part of the occipital bone (the clivus), and serves to connect the two inferior petrosal sinuses.