Inverted papilloma with ectopic bone formation.
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概要
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Ectopic ossification was found in the frontal and ethmoidal sinuses of a 45-year-old male patient. Both sinuses were filled with inverted papillomas, and the bones had no connection with the sinus walls. It is noteworthy that they had a mature fatty marrow. Several tumors have the ability to induce ectopic ossification. This is the first known report of ectopic bones probably induced by inverted papillomas. The origin of the bone-forming cells is unknown, but we speculate that mesenchymal cells might be transformed to osteoblasts, stimulated by the inverted papilloma.
- 耳鼻咽喉科臨床学会の論文
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