The author observed a rare case of fibrous dysplasia in 12 year old female who came to the Infirmary of Dental College, Seoul National University, complaining of facial asymmetry of 3 years' duration in right maxillofacial region. The serial radiograms has been taken, and the nature of the lesion established as a typical fibrous dysplasia according to the interpreted findings in their images. The author has obtained the results as follows: 1. Fibrous dysplasia occurred at 3 years of age in this case. 2. On familial tendency, traumatic history and endocrine disturbances were not noted in this patient. 3. The serial radiograms revealed a typical fibrous dysplasia encroaching right zygomatic bone.
You, Dong Soo 
- Department of Radiology, College of Dentistry, Seoul National University, Seoul (Korea, Republic of)