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The histopathology of the long process of the incus, which had caused no obvious otologic symptoms, was studied in our collection of human temporal bones.Forty-eight of the 110 specimens (44%) showed abnormal histopathology. The most frequently observed findings were localized bone absorption on the bone surface, which was sometimes scattered through the subperiosteum of the long process. The most severe finding was spherical bone absorption in the lenticular process.The etiology of these pathological findings could be inflammation, remodelling or some aging factor. Because these absorbed areas were always filled with fibrous connective tissue, the outer shape of the lenticular process remained normal.These pathological changes have no clinical significance by themselves, but following inflammation or mechanical trauma they can be contributing factors in the development of conductive deafness.
耳鼻咽喉科臨床学会の論文