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Table 2 Burchiel's classification scheme for facial pains commonly encountered in neurosurgical practice (modified from Burchiel, 2003 [3])

From: Current algorithm for the surgical treatment of facial pain

Pain category History/Pain pattern Other names
Trigeminal neuralgia type 1 Spontaneous onset (>50% episodic pain) Idiopathic trigeminal neuralgia
Trigeminal neuralgia type 2 Spontaneous onset (≥50% constant pain) Atypical trigeminal neuralgia
Trigeminal neuropathic pain Trigeminal injury - unintentional (trauma, sinus surgery)  
Trigeminal deafferentation pain Trigeminal injury – intentional deafferentation (after destructive procedures) Anesthesia dolorosa/hypesthesia dolorosa
Symptomatic trigeminal neuralgia/MS Multiple sclerosis  
Symptomatic trigeminal neuralgia/other causes Posterior fossa mass lesions, Chiari malformation Secondary trigeminal neuralgia
Postherpetic neuralgia Trigeminal Herpes Zoster outbreak  
Atypical facial pain Somatoform pain disorder