FIGURE LEGENDS
Fig. 1. Imaging of the Fallopian canal (arrowheads) in Case 3 at onset
(A – D, fat-saturated SPGR) and during remission (E, fat-suppressed
FFE). (A) The cisternal and canalicular segments, and geniculate
ganglions (g) in an axial section. (B) The tympanic segments in an axial
section. (C – E) The mastoid segments and the eustachian tube (arrow)
in an axial section (C) and coronal sections (D, E). Intense enhancement
in the tympanic and mastoid segments at onset is attenuated in
remission. Asterisks indicate the petrous apices with fatty marrow
collection.
Fig. 2. Imaging of the Fallopian canal (arrowheads) in Case 4 at onset
on fat-suppressed SPGR. (A) The tympanic segments in an axial section.
(B) The mastoid segments in a coronal section. (C, D) Maximum intensity
projection images in the range of dashed lines in A.Inflammatory changes
in the promontory, mastoid, and eustachian tube (arrows) are closely
associated with intensely enhanced Fallopian canal.
Fig. S1. Otologic examinations in Case 1 to Case 4. Audiogram at onset
and in remission is coloured in black and grey, respectively. Audiogram
in remission is not presented in Case 4 because of being under
treatment.