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Table 1 Clinical presentation, MRI and HRCT findings of 9 patients who underwent first-line MRI and ultimately confirmed as otosclerosis on subsequent HRCT

From: Role of MRI as first-line modality in the detection of previously undiagnosed otosclerosis: a single tertiary institute experience

Case number/sex/age

Clinical/audiometric presentation

Preliminary MRI findings

Interval between MRI and HRCT

Subsequent HRCT findings

Correlation between MRI and HRCT findings

1/F/43

Asymmetric (R) SNHL

Intermediate T1 signal and PCE in (B/L) FA regions + pericochlear regions

1 month

B/L fenestral and pericochlear hypodense plaques

MRI findings closely match HRCT

2/M/28

Asymmetric (L) SNHL

Reported normal

4 months

B/L fenestral hypodense plaques. No pericochlear disease

Otosclerosis missed on MRI at first read. Retrospective evaluation showed very subtle focal PCE in (B/L) FA

3/F/57

Asymmetric (L) SNHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions. Also enhancement around (B/L) SCC

2 weeks

B/L fenestral and pericochlear hypodense plaques. Also extensive plaques around B/L SCC

MRI findings closely match HRCT

4/M/41

Asymmetric (L) SNHL

Intermediate T1 signal and PCE at bilateral FA + (R) pericochlear region

1 month

B/L fenestral and pericochlear hypodense plaques.

(R) OW occluded, (L) OW narrowed

(L) pericochlear disease not detected on MRI

5/M/47

(B/L) heavy SNHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions

18 months

B/L fenestral and pericochlear hypodense plaques

MRI findings closely match HRCT

6/M/61

Asymmetric (L) SNHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions. Also T2 hyperintensity in (B/L) pericochlear regions

2 months

B/L fenestral and pericochlear hypodense plaques.

(L) RW obliterated

MRI findings closely match HRCT

7/M/64

(B/L) heavy SNHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions. Also T2 hyperintensity in (B/L) pericochlear regions. Right IAC diverticulum

1 week

B/L fenestral and pericochlear hypodense plaques

Right IAC diverticulum

MRI findings closely match HRCT

8/M/46

(R) MHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions

1 month

B/L fenestral and pericochlear hypodense plaques.

(R) OW obliterated

MRI findings closely match HRCT

9/F/61

(B/L) heavy SNHL

Intermediate T1 signal and PCE in (B/L) FA + pericochlear regions. Possible tiny (R) IAC diverticulum

1 month

B/L fenestral and pericochlear hypodense plaques.

Right IAC diverticulum

MRI findings closely match HRCT

  1. (R) right, (L) left, (U/L) unilateral, (B/L) bilateral, FA fissula antefenestram, OW oval window, RW round window, PCE post-contrast enhancement, IAC internal auditory canal