FIG 3. Modiolar deficiency with LEDS.

A, Axial T2-weighted FSE MR image of the left inner ear in a patient with LEDS shows mild modiolar deficiency. The modiolus (arrow) appears attenuated and flattened, unlike the normal modiolus seen in figure 2. The endolymphatic duct (section mark) and sac (asterisk) are markedly enlarged.

B, Axial T2-weighted FSE MR image in another patient shows moderate modiolar deficiency with near absence of the normal soft-tissue core at the central cochlear axis (arrow). Asterisk indicates endolymphatic sac.

(Reprinted from [22] with permission.)