Kuwabara Mikio, Matsumoto Yuko, Motegi Masaomi, Chikamatu Kazuaki
Otolaryngology-Head and Neck Surgery, Gunma University Hospital, Maebashi, JPN.
Otolaryngology-Head and Neck Surgery, Gunma University Graduate School of Medicine, Maebashi, JPN.
Cureus. 2025 Apr 23;17(4):e82860. doi: 10.7759/cureus.82860. eCollection 2025 Apr.
Osteoma of the middle ear is a rare condition in which tumors composed of mature bone grow. In the present study, we experienced a case of an osteoma causing the obstruction of the supratubal recess of the Eustachian tube, resulting in a depression in the pars flaccida of the tympanic membrane and fixation of the ossicles. The patient, a 37-year-old woman, had been aware of hearing loss for two years. Tympanic membrane findings showed a depression in the pars flaccida of the tympanic membrane, and audiometry showed mixed hearing impairment. A temporal bone computed tomography (CT) showed a spherical osteoma in the supratubal recess, with the ear ossicles adhering to the canopy with osteophytes. The patient underwent an endoscopic resection of the osteoma and tympanoplasty, and after two surgeries, her hearing improved. The osteoma in the supratubal recess was found to be a spongiotic osteoma. The osteophyte of the canopy was a compact osteoma. The slowly increasing spongiotic osteoma was thought to have exacerbated the ventilation of the epitympanum, leading to a depression of the pars flaccida of the tympanic membrane and the formation of compact osteoma due to inflammation.
中耳骨瘤是一种罕见的疾病，其中会生长出由成熟骨组成的肿瘤。在本研究中，我们遇到了一例骨瘤导致咽鼓管管上隐窝阻塞的病例，导致鼓膜松弛部凹陷和听小骨固定。患者为一名37岁女性，两年来一直意识到听力下降。鼓膜检查发现鼓膜松弛部凹陷，听力测试显示混合性听力障碍。颞骨计算机断层扫描（CT）显示管上隐窝有一个球形骨瘤，听小骨通过骨赘附着于骨瘤顶部。患者接受了骨瘤内镜切除术和鼓室成形术，两次手术后听力有所改善。管上隐窝的骨瘤被发现是海绵状骨瘤。骨瘤顶部的骨赘是致密性骨瘤。缓慢增大的海绵状骨瘤被认为加剧了上鼓室的通气，导致鼓膜松弛部凹陷，并因炎症形成致密性骨瘤。
