Practical imaging for Ménière's disease.

Area of Science:

• Otolaryngology
• Radiology
• Neuroscience

Background:

• Ménière's disease (MD) is a chronic inner ear disorder causing vertigo, hearing loss, tinnitus, and aural fullness.
• Pathophysiology involves endolymphatic hydrops, an abnormal accumulation of endolymph fluid, with unclear causes possibly linked to genetic, environmental, or autoimmune factors.

Purpose of the Study:

• To highlight advancements in Magnetic Resonance Imaging (MRI) for diagnosing Ménière's disease.
• To explain how MRI techniques differentiate endolymph and perilymph, aiding in MD diagnosis.

Main Methods:

• Utilizing gadolinium-based contrast agents in MRI to distinguish between endolymph and perilymph.
• Employing 3-dimensional fluid-attenuated inversion recovery (3D FLAIR) and 3-dimensional real-inversion recovery (3D real-IR) sequences.
• Classifying endolymphatic hydrops severity based on cochlear and vestibular dilation and assessing perilymphatic enhancement for blood-labyrinthine barrier integrity.

Main Results:

• MRI enables detailed visualization and grading of endolymphatic hydrops.
• Perilymphatic enhancement patterns indicate blood-labyrinthine barrier breakdown, a key diagnostic indicator for MD.
• Distinguishing enhancement patterns is crucial for accurate MD diagnosis and ruling out mimicking conditions.

Conclusions:

• Advanced MRI techniques significantly improve the diagnostic accuracy of Ménière's disease.
• MRI provides objective measures of endolymphatic hydrops and blood-labyrinthine barrier status.
• Precise interpretation of MRI findings is essential for differentiating MD from other inner ear disorders.