[Benign osteoblastoma. Apropos of a case localized in the upper maxilla]

Benign osteoblastoma is a benign bone tumour identified fairly recently. The names of Jaffe and Lichtenstein are associated with published work. Localisation in the maxillary sinus, as in the case presented here, is quite rare. Clinical examination reveals the presence of the tumour but gives no precise indication as to its nature. X-ray documents favourised its benign nature. Only histological study precisely determines the diagnosis, definitely eliminating the possibility of malignancy and, finally, differentiating benign osteoblastoma from other benign bone tumours. Treatment is purely surgical.