Puranik K R, Murthy P S, Gopalakrishna R, Nayak D R
ENT-III, Kasturba Hospital, Manipal, India.
J Laryngol Otol. 1992 Feb;106(2):164-5. doi: 10.1017/s0022215100118973.
Patients who present with a unilateral non-tender bony swelling in the mastoid region without any clinical evidence of middle ear infection could be diagnosed as having a fibrous or bony lesion affecting the temporal bone. In such cases, if there is radiological evidence of large lucent area in the mastoid antrum without any bony dehiscence one should keep in mind in the differential diagnosis a mega antrum in addition to congenital cholesteatoma and eosinophilic granuloma. A large lytic lesion in the mastoid segment of the temporal bone with an intact tympanic membrane therefore presents a diagnostic dilemma. A case of an unusually large mastoid antrum in an young adult with no middle ear suppuration and a cosmetically unacceptable swelling behind the ear is presented.
出现乳突区单侧无压痛性骨质肿胀且无中耳感染临床证据的患者，可诊断为患有累及颞骨的纤维性或骨性病变。在这种情况下，如果乳突气房有大片透亮区的影像学证据且无骨质裂开，除先天性胆脂瘤和嗜酸性肉芽肿外，鉴别诊断时应考虑到大气房。因此，颞骨乳突段出现大的溶骨性病变且鼓膜完整，就会带来诊断难题。本文介绍了一例年轻成人中出现异常大气房、无中耳化脓且耳后有美容上难以接受的肿胀的病例。
