Swartz J D, Wolfson R J, Marlowe F I, Popky G L
Radiology. 1985 Mar;154(3):697-700. doi: 10.1148/radiology.154.3.3918333.
Postinflammatory ossicular fixation is a common problem encountered by the otologic surgeon upon exploration because of conductive hearing loss in patients with chronic otitis media. These nonotosclerotic noncongenital lesions take three pathologic forms: fibrous tissue fixation (chronic adhesive otitis media), hyalinization of collagen (tympanosclerosis), and new bone formation (fibro-osseous sclerosis). Fibrous tissue fixation appears on CT as nonbony, noncalcific soft-tissue debris encasing some or all of the ossicular chain. Tympanosclerosis appears as unifocal or multifocal punctate or weblike calcifications in the middle ear cavity or on the tympanic membrane. This debris may be in direct apposition to the ossicular chain or may replace the suspensory ligaments in symptomatic patients. New bone formation has been identified only in the attic and is the least common manifestation. Thick bony webs or generalized bony encasement may be present at CT. More than 300 patients with the clinical diagnosis of chronic otitis media have been examined. This study encompasses 23 proved cases.
炎症后听骨固定是耳科医生在探查时因慢性中耳炎患者传导性听力损失而遇到的常见问题。这些非耳硬化性非先天性病变有三种病理形式：纤维组织固定（慢性粘连性中耳炎）、胶原玻璃样变（鼓室硬化）和新骨形成（纤维性骨硬化）。纤维组织固定在CT上表现为包裹部分或全部听骨链的非骨性、非钙化软组织碎片。鼓室硬化表现为中耳腔或鼓膜上的单灶性或多灶性点状或网状钙化。在有症状的患者中，这些碎片可能直接附着于听骨链或取代悬韧带。新骨形成仅在鼓室上隐窝被发现，是最不常见的表现形式。CT上可能出现厚的骨网或广泛的骨包绕。超过300例临床诊断为慢性中耳炎的患者接受了检查。本研究包括23例确诊病例。
