Rare case of salivary gland choristoma originating in inner ear in 8-year-old:A report
Salivary gland choristoma (SGCh) is a rare benign tumor reported in several unusual sites, such as the gastrointestinal tract, the optic nerve, and the internal auditory canal, but never reported in the inner ear. It is a rare benign tumor characterized by a histopathological finding of normal salivary tissue, mucous and mixed predilection, and occasionally, fibrosis . SGCh is distinguished from ectopic salivary glands which are present in abnormal locations without fibrous capsules .
In a recent development, a team of doctors under Yoshiharu Yamanobe, have reported an extremely rare case of a large inner ear SGCh extending into the middle ear and the internal auditory canal (IAC), with congenital unilateral profound hearing loss and ipsilateral progressive facial nerve palsy.The case has been reported in Journal of Otolaryngology - Head & Neck Surgery.
The primary sites of SGCh have been reported in several organs, such as the gastrointestinal tract, the optic nerve, and the internal auditory canal . SGCh in the middle ear can sometimes be accompanied by an aberrant facial nerve and middle ear malformations. "We had reasons to consider that the inner ear was the primary site in this case. First, the patient had a congenital profound hearing loss. Second, no previous abnormalities in the tympanic membrane had been detected. Third, imaging studies suggested that the tumor was mainly located in the inner ear."the team elaborated.
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