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Insights into Imaging
Fig. 5 | Insights into Imaging

Fig. 5

From: Imaging of sensorineural hearing loss: a pattern-based approach to diseases of the inner ear and cerebellopontine angle

Fig. 5

Labyrinthitis. a-e Patient 1 developed acute, severe hearing loss while suffering from meningitis. On 3D T2 TSE MRI (a) bilateral signal loss of the cochleovestibular system is seen, suggestive of obliteration by inflammatory cells and fibroblasts. Contrast-enhanced T1 weighted images (b, c) show diffuse, irregular enhancement due to ongoing inflammation. Corresponding CT images show slightly increased density in the basal turn of the right cochlea (arrow in d) due to starting bone formation. The left ear (e) appears normal on CT. f-h Patient 2 had undergone several surgical procedures for chronic otitis media and cholesteatoma in the past. Three-dimensional T2 TSE image shows signal loss in the basal turn of the right cochlea and complete obliteration of the left inner ear (white arrows in f). CT confirms bony obliteration in the proximal basal turn of the right cochlea (black arrows in g), but no signs of obliteration on the left (h)

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