Department of Radiology, Mayo Clinic, Jacksonville, FL, USA.
Department of Otolaryngology, Mayo Clinic, Jacksonville, FL, USA.
Neuroradiol J. 2022 Dec;35(6):724-726. doi: 10.1177/19714009221096820. Epub 2022 May 4.
Cartilage cap resurfacing is a method to seal a superior semicircular canal dehiscence. The purpose of this study was to evaluate the detection of new bone formation after surgical placement of a cartilage cap over a dehiscent semicircular canal.
In this retrospective review, two neuroradiologists blinded to each other's interpretation reviewed the temporal bones of 20 patients, five of which had a pre-operative computed tomography (CT) exam which was interpreted as unilateral superior semicircular canal dehiscence and with new bone formation following repair on follow-up CT. There were also 15 control subjects. Each neuroradiologist was blinded to history, including post-operative changes, and asked to determine if there was a dehiscence or no dehiscence.
Out of the 15 controls, there was 100% inter-observer agreement. On the five post-operative patients, there was agreement in 4/5 that there was no dehiscence post-operatively and 1/5 agreement of dehiscence post-operatively, but ectopic bone adjacent to the dehiscence.
Our results indicate that new bone formation can be seen at the site of cartilage cap placement over the dehiscence and be interpreted as bony closure of the dehiscence.
软骨帽覆盖是一种封闭上半规管裂的方法。本研究旨在评估在半规管裂处放置软骨帽后新骨形成的检测。
在这项回顾性研究中，两位神经放射科医生对 20 名患者的颞骨进行了盲法评估，其中 5 名患者在术前 CT 检查中被诊断为单侧上半规管裂，并在随访 CT 检查中发现新骨形成。还有 15 名对照者。每位神经放射科医生都对病史（包括术后变化）进行了盲法评估，并被要求确定是否存在裂或无裂。
在 15 名对照者中，有 100%的观察者间一致性。在 5 名术后患者中，有 4/5 的患者认为术后无裂，1/5 的患者认为术后有裂，但裂处有异位骨。
我们的结果表明，在裂处放置软骨帽后可以看到新骨形成，并可被解释为裂的骨性闭合。
