Fibrous dysplasia is an abnormal bone growth where normal bone is replaced with fibrous bone tissue. Fibrous dysplasia causes abnormal growth or swelling of bone. Fibrous dysplasia can occur in any part of the skeleton but the bones of the skull, thigh, shin, ribs, upper arm and pelvis are most commonly affected. Fibrous dysplasia is very rare, and there is no known cure. Fibrous dysplasia is not a form of cancer.
Most lesions are monostotic, asymptomatic and identified incidentally and can be treated with clinical observation and patient education.
This disorder is usually diagnosed in childhood or early adulthood and can affect one or several bones. Males and females of any race are equally affected.

The cause of surgery is to decompress the neural structures involved and for cosmetic reasons.

The patient came to the clinic 01-July-1995 complaining of slowly growing bony mass in the left side of the face with pain in the left upper jaw for 4 years with progressive course. The patient was admitted 07-October-1995.

On examination; the patient is alert and has disfigurement of the face due to a mass in the left maxillary area. with hypalgesia of the left side of the face and numbness of the left V2 division. CT-scan of the brain done recently showing wide involvement of the left parasellar region reaching the left maxilla, compressing the left optic nerve and obstructing the left side of the nasal cavity.

The face and moth cavity were prepared and through 2 separate incisions on in the upper gingiva and one along the inferior edge of the left orbit were created. Using high speed drill, a big rounded mass was removed from the anterior wall of the left maxilla and and the anterior wall of the maxilla was opened and through that defect, further drilling and dissection was done to maximally remove the fibrous bone. The maxillary nerve and accompanying artery was preserved. The affected parts of the ethmoid sinuses and the sphenoid sinus were included in the drilling. The other left parasellar parts were not accessible from this approach and it was decided to perform the unreachable parts to another surgery with the use of another pterional approach. The bone defect in the anterior wall of the maxilla was closed with artificial bone. Routine closure of the wounds. The operation took 8 hours period.

Smooth postoperative recovery. The patient discharged 12-October-1995.