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The Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

Anatomy of the Ear

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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Updated: Jun 9, 2026

Surgical Treatment of an Endolymphatic Sac Tumor

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Published on: May 26, 2023

Intracochlear schwannoma.

Giuseppe Magliulo¹, Giovanna Colicchio, Alla Francesca Romana

¹Otorhinolaryngology, Audiology and Phoniatrics "G. Ferreri" Department, University La Sapienza of Rome, Italy.

Skull Base : Official Journal of North American Skull Base Society ... [Et Al.]

|September 3, 2010

Summary

Intralabyrinthine schwannomas, rare nerve tumors, are best diagnosed with MRI. A case study details their classification and a "wait-and-see" management approach.

Keywords:

Intralabyrinthine schwannoma MRI follow-up surgery

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Published on: February 29, 2020

Area of Science:

Neuro-oncology
Radiology
Otolaryngology

Background:

Intralabyrinthine schwannomas are benign tumors arising from Schwann cells of the vestibulocochlear nerve.
These slow-growing tumors affect the inner ear structures.
Accurate diagnosis is crucial for appropriate management.

Observation:

Magnetic resonance imaging (MRI) with gadolinium contrast is the gold standard for diagnosing intralabyrinthine schwannomas.
Kennedy et al. developed a seven-class MRI-based classification system detailing tumor location.
A case report presents a 2-year serial MRI follow-up of a patient managed conservatively.

Findings:

The study discusses the diagnostic rationale and treatment options for intralabyrinthine schwannomas.
Serial MRI monitoring allows for conservative management in select cases.
Tumor classification aids in understanding potential growth patterns and clinical impact.

Implications:

This work highlights the importance of advanced imaging in diagnosing inner ear tumors.
It provides insights into the clinical application of a specific schwannoma classification system.
The case study supports the feasibility of a "wait-and-see" strategy for select intralabyrinthine schwannomas, guiding clinical decision-making.