Isolated unilateral facial nerve palsy: an unusual manifestation of recurrent diffuse large B-cell lymphoma.

The article presents a case study of a 79-year-old man who was referred to dermatology clinic for evaluation of left facial paresis of 1-year duration and initially treated with corticosteroids for presumed Bell's palsy. His magnetic resonance imaging (MRI) revealed no definitive abnormalities along the courses of cranial nerves. His histopathology interpreted as granulomatous dermatitis consistent with a ruptured follicle or cyst and diagnose with facial nerve palsy.