Glomus tympanum tumor
A glomus tympanum tumor is a tumor of the middle ear and bone behind the ear (mastoid).
Paraganglioma - glomus tympanum
Causes, incidence, and risk factors
A glomus tympanum tumor grows in the temporal bone of the skull, behind the ear drum (tympanic membrane).
This area contains nerve fibers (glomus bodies) that normally respond to changes in body temperature or blood pressure.
These tumors usually occur late in life, around age 60 or 70, but they can appear at any age.
The cause of a glomus tympanum tumor is unknown. Usually, there are no known risk factors. Glomus tumors have been associated with changes (mutations) in a gene responsible for the enzyme succinate dehydrogenase (SDHD).
- Hearing problems or loss
- Ringing in the ear (pulsatile tinnitus )
- Weakness or loss of movement in the face (facial nerve palsy)
Signs and tests
Glomus tympanum tumors are diagnosed by a physical examination. They may be seen in the ear or behind the ear drum.
Diagnosis also involves scans, including:
Glomus tympanum tumors are rarely cancerous and do not tend to spread to other parts of the body. However, treatment may be needed to relieve symptoms.
Patients who have surgery tend to do well. More than 90% of people with glomus tympanum tumors are cured.
The most common complication is hearing loss.
Nerve damage, which may be caused by the tumor itself or damage during surgery, rarely occurs. Nerve damage can lead to facial paralysis .
Calling your health care provider
Call your health care provider if you notice:
- Difficulty with hearing or swallowing
- Problems with the muscles in your face
- Pulsing sensation in your ear
Rucker JC. Cranial neuropathies. In: Bradley WG, Daroff RB, Fenichel GM, Jankovic J. . 5th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 74.
Marsh M, Jenkins H. Temporal bone neoplasms and lateral cranial base surgery. In: Cummings CW, Flint PW, Haughey BH, et al. . 4th ed. St. Louis, Mo: Mosby; 2005:chap 162.