What does high riding right jugular bulb mean?

High riding jugular bulb is defined as an extension of the most cephalad portion of the Jugular bulb superior to the floor of the internal auditory canal or it can projects above the basal turn of the cochlea [2]. It could also be a diverticulum arising from the Jugular bulb.

Can a high riding jugular bulb be fixed?

Tinnitus and hearing loss can occur in patients with a high-riding abnormal jugular bulb. Jugular vein ligation in selected patients can cure tinnitus and reverse hearing loss.

Can a high riding jugular bulb cause dizziness?

Objective. Jugular bulb abnormalities can induce tinnitus, hearing loss, or vertigo. Vertigo can be very disabling and may need surgical treatments with risk of hearing loss, major bleeding or facial palsy.

Where is the right jugular bulb?

The jugular bulb (JB) is the confluence of the lateral venous sinuses situated in the jugular fossa. It drains extracranially to the internal jugular vein as it passes through the jugular foramen of the posterior cranial fossa. The precise location of this structure within the temporal bone is variable.

What makes a jugular bulb a high riding bulb?

A high riding jugular bulb indicates the dome (roof) of the jugular bulb extends more superiorly in the petrous temporal bone than is typical. The transverse level above which a jugular bulb is considered high riding has been variably defined as the following 1,6,8: floor of the internal acoustic meatus (internal auditory canal) 2,4

What kind of tumor is a vestibular schwannoma?

Vestibular schwannomas, also known as acoustic neuromas, are relatively common tumors that arise from the vestibulocochlear nerve (CN VIII) and represent ~80% of cerebellopontine angle (CPA) masses. Bilateral vestibular schwannomas are strongly suggestive of neurofibromatosis type 2 (NF2).

Can a jugular bulb cause an IAC lesion?

The jugular bulb itself is very fragile, and manipulation of the bulb will invariably lead to bleeding from micro tears in the wall. The jugular bulb rarely extends to the IAC, and when it does, symptoms that are associated with pulsatile tinnitus, not vertigo, would usually manifest.

Can a large jugular bulb cause hearing loss?

Though uncommon, the jugular bulb on one side may become very large and ride superiorly, well into the middle of the ear space or against the tympanic membrane. In such cases, the contact of the jugular bulb against the tympanic membrane can cause conductive hearing loss and pulsatile tinnitus ( Laryngoscope. 2013 Jul;123 (7):1803).