title: Lipomatosis of the trigeminal nerve causing trigeminal neuralgia: case report and literature review.
abstract: Cerebellopontine angle lipomas are rare and attempts at surgical excision are associated with significant morbidity. Lipomatosis of nerve, the fatty infiltration of nerves, is a distinct entity. We present a case of intractible trigeminal neuralgia caused by lipomatosis of the trigeminal nerve.
  
  
  METHODS
  A 25-year-old male presented with severe right-sided trigeminal neuralgia. Imaging showed a lesion involving the trigeminal nerve with signal characteristics of fat. At surgery the lesion was found to be a fatty infiltration of the nerve itself. Surgery was therefore limited to arachnoid adhesiolysis. The patient remains symptom-free and neurologically intact to date. Correctly identifying these lesions as lipomatosis of nerve rather than lipoma of the cerebellopontine angle make it clear that even partial surgical excision will inevitably result in neurological deficit and should not be attempted. However, in the case of intractable trigeminal neuralgia we demonstrate that surgery can still play a role.
authors.affiliation: Department of Neurosurgery, The Royal London Hospital, Barts and the London NHS Trust, London, United Kingdom.
authors.forename: Eleni Chryssa
authors.initials: EC
authors.lastname: Maratos
authors.forename: Maria Terésa
authors.initials: MT
authors.lastname: Goicochea
authors.forename: Santiago
authors.initials: S
authors.lastname: Condomí-Alcorta
authors.forename: Rubén
authors.initials: R
authors.lastname: Mormandi
authors.forename: Jorge
authors.initials: J
authors.lastname: Salvat
authors.forename: Andrés
authors.initials: A
authors.lastname: Cervio