Familial recurrent peripheral facial palsy

Familial recurrent peripheral facial palsy, also known as hereditary recurrent facial palsy or familial Bell's palsy, is a rare neurological condition characterized by repeated episodes of peripheral facial nerve (cranial nerve VII) paralysis occurring in multiple members of the same family. Unlike sporadic Bell's palsy, which typically occurs as an isolated event, this familial form is distinguished by its recurrent nature and clear familial clustering, suggesting a genetic predisposition. The condition primarily affects the peripheral nervous system, specifically the facial nerve. During episodes, patients experience sudden onset of unilateral (one-sided) or occasionally bilateral weakness or paralysis of the facial muscles. This leads to difficulty closing the eye on the affected side, drooping of the mouth, impaired ability to smile or make facial expressions, difficulty eating and drinking, and sometimes altered taste sensation or hyperacusis (increased sensitivity to sound). Episodes may affect the same or alternating sides of the face and tend to recur over months to years. Between episodes, patients may experience partial or complete recovery of facial function, though repeated episodes can lead to residual facial weakness. Some families with this condition also exhibit features of Melkersson-Rosenthal syndrome, which includes orofacial edema and fissured tongue (lingua plicata) in addition to recurrent facial palsy. Treatment is largely supportive and similar to that for sporadic Bell's palsy, including corticosteroids during acute episodes to reduce inflammation and promote recovery, eye protection measures to prevent corneal damage when eye closure is impaired, and physical therapy to maintain facial muscle function. There is no specific preventive therapy for recurrences, and management focuses on optimizing recovery after each episode.

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