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Bilateral glomus tympanicum tumors: Human temporalbone study.

Hisaki Fukushima^1,2, Hirotaka Hara¹, Michael M Paparella³

¹Department of Otolaryngology, Kawasaki Medical School, Kurashiki, Okayama, Japan.

Clinics and Practice

|October 3, 2018

Summary

This study reports the first case of bilateral glomus tympanicum tumors found in human temporal bones. These rare tumors presented without pulsatile tinnitus or conductive hearing loss.

Keywords:

Glomus tympanicum tumor histopathology human temporal bone

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Area of Science:

Otolaryngology
Pathology
Neurosurgery

Background:

Glomus tympanicum tumors are rare, typically unilateral, and arise from paraganglia in the temporal bone.
Bilateral presentations are exceptionally uncommon, making their histopathologic characteristics and clinical presentation noteworthy.

Purpose of the Study:

To describe the histopathologic features of bilateral glomus tympanicum tumors in human temporal bones.
To document the clinical and audiological findings associated with this rare condition.

Main Methods:

Histopathologic examination of human temporal bones post-mortem.
Clinical data review, including audiological assessments and symptom reporting.

Main Results:

Bilateral, small glomus tympanicum tumors were identified, primarily located on the promontory.
Despite bilateral tumors, the patient experienced no pulsatile tinnitus or conductive hearing loss.
Tympanic membranes remained intact in both ears.

Conclusions:

This case represents the first documented instance of bilateral glomus tympanicum tumors.
The findings highlight the potential for asymptomatic presentation of these tumors, challenging typical clinical expectations.