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.