[Bell's palsy: a broad differential diagnosis].

Area of Science:

• Neurology
• Otolaryngology

Context:

• Peripheral facial palsy is a frequent clinical presentation.
• Bell's palsy is the most common etiology.
• Pathogenesis remains largely unclear, with potential viral triggers and inflammation implicated.

Purpose:

• To highlight the diagnostic and therapeutic challenges in managing peripheral facial palsy.
• To emphasize the need to consider differential diagnoses beyond Bell's palsy.

Summary:

• Bell's palsy, a common cause of facial nerve paralysis, typically follows a monophasic course with variable recovery.
• Inflammation of the facial nerve, potentially post-viral, is a suspected but unconfirmed cause.
• Clinical diagnosis can be difficult, risking oversight of alternative etiologies for isolated facial palsy.

Impact:

• Improved clinical awareness for accurate diagnosis of facial palsy.
• Guidance for clinicians in managing Bell's palsy and considering other causes.
• Potential for earlier and more appropriate treatment of peripheral facial palsy.