Ramsay Hunt syndrome type II
|Ramsay Hunt syndrome (RHS) type 2|
|Classification and external resources|
|ICD-10||B02.2 (ILDS B02.270), G53.0|
Ramsay Hunt syndrome (RHS) type 2 also known as herpes zoster oticus is a disorder that is caused by the reactivation of pre-existing herpes zoster virus in a nerve cell bundle in the head (the geniculate ganglion). The neurons in this ganglion are responsible for the movements of facial muscles, the touch sensation of a part of ear and ear canal, the taste function of the frontal two-thirds of the tongue, and the moisturization of the eyes and the mouth. The syndrome specifically refers to the combination of this entity with weakness of the muscles activated by the facial nerve. In isolation the latter entity would be called Bell's Palsy.
Symptoms and signs 
The symptoms and signs include acute facial nerve paralysis, pain in the ear, taste loss in the front two-thirds of the tongue, dry mouth and eyes, and eruption of an erythematous vesicular rash in the ear canal, the tongue, and/or hard palate.
RHS type 2 is essentially shingles of the geniculate ganglion. Briefly, the herpes zoster virus lies dormant in various nerve cells in the body, where it is kept in check by the patient's immune system. Given the opportunity, for example during an illness that suppresses the immune system, the virus is reactivated and travels to the end of the nerve cell, where it causes the symptoms described above.
Like shingles, however, lack of lesions does not definitely exclude the existence of a herpes infection. The virus can be detected, even before the eruption of vesicles, from the skin of the ear.
The largest study on the treatment of RHS type 2 has shown that complete recovery can be achieved in 75% of patients if treatment with prednisone and acyclovir is started within the first 3 days of onset of facial paralysis. Chances of complete recovery decrease as treatment is delayed. Studies have shown that half of all patients whose treatment was delayed had complete loss of response to facial nerve stimulation.
Treatment apparently has no effect on the recovery of hearing loss.
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- ramsay2 at NINDS
- Ramsay Hunt syndrome at GPnotebook
- NINDS Herpes Zoster Oticus Information Page National Institute of Neurological Disorders and Stroke
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- drtbalu otolaryngology on line
- Ramsay Hunt Syndrome Causes, Symptoms, Diagnoses
- Vaccine at Centers for Disease Control and Prevention
- MR scans Imaging Zoster Oticus