A Case of Recurrent Osteoclastoma of the Paranasal Sinuses in a Patient with Paget's Disease

Paget's disease is a well-known disorder of unclear etiology that results in deformity and enlargement of single or multiple bones due to abnormal osteoclastic-osteoblastic remodeling of bone. Osteoclastoma, also known as giant cell tumor, is a rare complication of Paget's disease that usually occurs in the skull or facial bones. This is a report of a 35-year-old woman with recurrent osteoclastoma of the sino-nasal tract, a complication of Paget's disease, for which she underwent 4 operations. Clinicopathological features of this rare disease are described here.