New bone formation over dehiscent semicircular canal with cartilage cap

Alok A. Bhatt, Prasanna Vibhute, Vivek Gupta, David A. Zapala, Robert A. Pooley, Larry B. Lundy

Research output: Contribution to journalArticlepeer-review


Purpose: 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. Methods: 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. Results: 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. Conclusion: 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.

Original languageEnglish (US)
Pages (from-to)724-726
Number of pages3
JournalNeuroradiology Journal
Issue number6
StatePublished - Dec 2022


  • cartilage cap
  • semicircular canal dehiscence
  • temporal bone

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology


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