Idiopathic bilateral central giant cell reparative granuloma of jaws: a case report and literature review.

Objectives: The central giant-cell reparative granuloma has been defined as a localized benign but sometimes aggressive osteolytic proliferation consisting of fibrous tissue with hemorrhage and hemosiderin deposits, presence of osteoclast-like giant cells and reactive bone formation. It is a benign lesion usually appears as solitary, multilocular, radiolucencies, located in the mandible and maxilla. Multiple CGCRGs of the jaw bones is very rare and, if it occurs, it is usually associated with hyperparathyroidism in majority of the cases .This report presents an unusual case of a 12-year-old girl who has idiopathic, bilateral giant cell granulomas of the angulus mandible.

Methods: A 12 year-old girl was admitted to our department with complain of swelling on both right and left side of her lower jaw. There was no history of trauma, dental problem or neck infection. Blood chemistry, including calcium, alkaline phosphatase and inorganic phosphorus was normal. Patient had not family history, clinical appearance like cherubism or noonan syndrome and systemic anomalies. MRI showed, in right ramus mandible, 37 x mm x 35 mm x 28 mm size mass and in lenf ramus mandible, an expansile, 30 mm 38 mm x 12 mm size mass. The patient underwent surgical curettage of the lesion through an intraoral approach under general anesthesia.

Result: The histopathologic examination of the lesion was reported as 'giant cell reparative granuloma.

Conclusion: Our patient had multiple CGCRG in her jaw. In literature there is several reports about multiple CGCRG but unlike of that report our patient had no syndromes like Cherubism, Noonan syndrome, neurofibromatosis type-1 and systemic disease like hyperparathyroidism ,fibrous dysplasia. So we define this case as Idiopathic bilaterally central giant cell reparative granuloma of jaw.