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. 2012 Oct 13;2(3):188–197. doi: 10.1016/j.jobcr.2012.10.002

Table 2.

The various etiologic factors for TN.

Aetiology
  • A.
    Compression of the trigeminal nerve root caused by:
    • a)
      Intracranial vascular abnormalities e.g. aberrant loop of the superior cerebellar artery, aneurysm of the intra-petrous portion on the internal carotid artery
    • b)
      Intracranial tumours
    • c)
      Petrous ridge (Basilar compression)
    • d)
      Foreign object
    • e)
      Bone lesion such as osteoma
  • B.

    Multiple Sclerosis

  • C.
    Others
    • a)
      Trauma
    • b)
      Viral infection (postherpetic neuralgia)
    • c)
      Ratner's jaw bone cavities
    • d)
      Infiltrative disorders of the trigeminal nerve root, gasserian ganglion and nerve
    • e)
      Familial occurrence as reported in Charcot–Marie–Tooth disease
    • f)
      Sarcoidosis and Lyme disease neuropathy