Table 1.

Differential Diagnosis of Acquired Bilateral Peripheral Facial Palsy

Trauma	Skull fractures
	Parotid surgery
	Mastoid surgery
Infection	Postinfluenza
	Infectious mononucleosis
	HIV infection
	Lyme disease, Banwarth's syndrome
	Guillain–Barre syndrome
	Syphilis
	Brainstem encephalitis
	HTLV-1 infection
	Poliomyelitis
Metabolic	Diabetes
	Acute porphyria
Neoplastic	Acute leukemia
	Acoustic neuroma
Autoimmune	Sarcoidosis
	Amyloidosis
Neurological	Multiple sclerosis
	Pseudobulbar and bulbar palsy
	Parkinson's disease
Idiopathic	Bell's palsy

HTLV, human T-cell lymphotrophic virus.