A 14-year-old who had 7episodes of relapsing unitaleral paralysis of facial nerve during 7 year-;. was admitted to the hospital. The X-Ray revealed Osteopetrosis, and the bone biopsy was proved this diagnosis. But there was not any bone fracture, or anemia. Pressure over facial nerve caused by condensation of entire facial nerve canal. was detected by tomographia. Probablv intermitant facial nerve swelling due to mentioned pressure causes relapsing Facial nerve paralysis.
According to the different reports the optic nerve atrophia is most frequent and the facial nerve Paralysis is less frequent complication, and relapsing form has never been reported. In some experiences the operation has been done only for patency of optic nerve's canal. In facial nerve complication, corticosteroid can be used for the prevention of intestinal calcium absorption, and finally reduces tJ-e nerve welling.
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