Fibrous dysplasia is characterized by the displacement of the Normal Substance of the interior of the bone by fibro-osseous connective tissue and have a tendency to stabilize with cessation of Skeletal growth without any disturbance of calcium metabolism. The authors report a case of monostotic Fibrous dysplasia with complaints of intermittent epistaxis, nasal obstruction, tenderness and painful swelling on the left dorsum nasi and orbital rim for five months, whose final diagnosis was mode by excisional biopsy through Caldwell Luc approach.