Table 2 CT grading of otosclerosis (Symons/Fanning 2005)
CT grading of otosclerosis | Location of plaques |
|---|---|
Grade 1 | Solely fenestral |
Grade 2 | Patchy localised cochlear disease (+/− fenestral involvement) • To basal turn (grade 2A) • To middle turn (grade 2B) • Around lateral aspect of basal, middle, apical turns (grade 2C) |
Grade 3 | Diffuse confluent cochlear involvement (+/− fenestral involvement) |