TABLE 2.

Summary of our cases

	Case 1	Case 2	Case 3
Age (Years old)	74	62	68
Sex	Male	Female	Female
Past medical history	None	Diabetes, postoperative endometrial cancer	Untreated diabetes
Primary symptoms	Hearing loss, vertigo	Hearing loss	Hearing loss, vertigo
Other symptoms	Otorrhea	Vertigo	Facial nerve paralysis
Hearing of affected side	No measurable hearing	No measurable hearing	No measurable hearing
Postoperative hearing	No change	Slight improvement of bone conduction hearing	No change
Location of the lesion	Middle ear – Facial nerve – Petrous apex – Middle cranial fossa – Dura – Labyrinth – Internal auditory canal	Jugular bulb – Dura – Labyrinth – Internal auditory canal	Mastoid – Middle ear – Facial nerve – Petrous apex – Labyrinth – Internal auditory canal
Destruction of the perimeter	Otic capsule, vestibule, cochlea, ossicles, facial neural tube, and internal carotid artery canal	Otic capsule, posterior semicircular canal, vestibule, the base of the skull	Vestibule, cochlea, semicircular canal
MRI	Strong contrast effect, T2 low	Slight contrast effect, T1 high, T2 high, Lobular multifocal cystic lesions	Mild contrast effect, T1 iso‐low
Treatment	Resection (transotic approach)	Resection (retrolabyrinthine approach)	Transcanal biopsy (chemotherapy for the colorectal cancer)
Progress	Total removal and no recurrence	Subtotal removal and no regrowth	Shrinkage and no regrowth

Abbreviation: MRI, magnetic resonance imaging.