血管瘤是一种常见的血管肿瘤，好发于头颈部，但岩骨中罕见。我们报告第一例乳突窦孤立性海绵状血管瘤。一位 68 岁的女性因耳鸣而到我们医院就诊，没有任何其他症状。右耳耳鸣尤其在患者打哈欠或吞咽时发生。耳镜检查显示两侧鼓膜均正常。纯音听力测试显示，右耳轻度听力损失高达 25 分贝。颞骨计算机断层扫描显示窦口处有一个 7.0 mm × 4.5 mm × 5 mm 的孤立软组织肿块。与乳突切除术一样，在全身麻醉下通过根管壁进行切除活检。肿块被完全切除，没有任何出血或听骨链损伤。肿块被证实为海绵状血管瘤。随访过程中，患者耳鸣、右低音听力下降有所改善。既往未见乳突窦孤立性血管瘤的报道。手术切除病变似乎是获得病理证实并缓解症状的正确治疗方法。

Hemangioma is a common vascular neoplasm that arises in the head and neck regions but is rare in the petrous bone. We report the first case of a solitary cavernous hemangioma in the mastoid antrum. A 68-year-old woman visited our hospital with a complaint of tinnitus without any other symptoms. Tinnitus of the right ear occurred especially when the patient yawned or swallowed. Both tympanic membranes appeared normal on otoscopic examination. On pure-tone audiometry, mild hearing loss up to 25 dB was detected in the right ear. Temporal bone computed tomography revealed a 7.0 mm × 4.5 mm × 5 mm, solitary soft tissue mass in the aditus ad antrum. Excisional biopsy was performed under general anesthesia through the canal wall as in a mastoidectomy. The mass was completely removed without any bleeding or ossicular chain damage. The mass was confirmed as a cavernous hemangioma. During follow-up, the patient's tinnitus and right low-tone hearing loss improved. No solitary hemangioma of the mastoid antrum has been reported previously. Surgical excision of the lesion appears to be proper treatment to achieve pathologic confirmation along with resolution of symptoms.