Non-epithelial tumors of the nasal cavity, paranasal sinuses, and nasopharynx: A clinicopathologic study.II. Osseous and fibro-osseous lesions, including osteoma, fibrous dysplasia, ossifying fibroma, osteoblastoma, giant cell tumor, and osteosarcoma

In a study of non-epithelial tumors involving the nasal cavity, paranasal sinuses, and nasopharynx, 256 lesions, 156 benign and 100 malignant, were identified. Of these, 64 were osseous and fibro-osseous lesions. Included in this group were osteomas, fibrous dysplasia, ossifying fibromas, benign osteoblastoma, giant cell tumors, and osteosarcomas. The problem of diagnostic terminology and categorization in this group of lesions is discussed. For each type of lesion, clinical features, histologic findings, and results of treatment are presented and clinicopathologic correlations are made.