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Tumor and Tumor-like Lesion of Bone

Tumor and Tumor-like Lesion of Bone. Osteoma. Osteoma is a benign mass protruding from osseous tissue. Osteoma. Most common tumor of the paranasal sinuses, most frequently seen in the frontal sinus and ethmoids Two varieties are described: the dense 'ivory' type and 'cancellous' osteoma.

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