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13. CRANIAL NEURALGIAS AND CENTRAL CAUSES OF FACIAL PAIN 13.1. Trigeminal neuralgia 13.1.1. Classical trigeminal neuralgia [G50.00] 13.1.2. Symptomatic trigeminal neuralgia [G53.80] + [code to specify aetiology] 13.2. Glossopharyngeal neuralgia 13.3. Nervus intermedius neuralgia [G51.80] 13.4. Superior laryngeal neuralgia [G52.20] 13.5. Nasociliary neuralgia [G52.80] 13.6. Supraorbital neuralgia [G52.80] 13.7. Other terminal branch neuralgias [G52.80] 13.8. Occipital neuralgia [G52.80] 13.9. Neck-tongue syndrome 13.10. External compression headache 13.11. Cold-stimulus headache 13.12. Constant pain caused by compression, irritation or distortion of cranial nerves or upper cervical roots by structural lesions [G53.8] + [code to specify aetiology] 13.13. Optic neuritis [H46]  13.14. Ocular diabetic neuropathy [E10-E14]  13.15. Head or facial pain attributed to herpes zoster 13.16. Tolosa-Hunt syndrome 13.17. Ophthalmoplegic “migraine” 13.18. Central causes of facial pain 13.19. Other cranial neuralgia or other centrally-mediated facial pain [code to specify aetiology] Bibliography and reference14. OTHER HEADACHE, CRANIAL NEURALGIA, CENTRAL OR PRIMARY FACIAL PAIN 

IHS	Diagnosis	ICD-10
13.1.2	Symptomatic trigeminal neuralgia [G53.80] + [code to specify aetiology]	G44.847

Description:

Pain indistinguishable from 13.1.1 Classical trigeminal neuralgia but caused by a demonstrable structural lesion other than vascular compression.

Diagnostic criteria:

Paroxysmal attacks of pain lasting from a fraction of a second to 2 minutes, with or without persistence of aching between paroxysms, affecting one or more divisions of the trigeminal nerve and fulfilling criteria B and C
Pain has at least one of the following characteristics:
1. intense, sharp, superficial or stabbing
2. precipitated from trigger areas or by trigger factors
Attacks are stereotyped in the individual patient
A causative lesion, other than vascular compression, has been demonstrated by special investigations and/or posterior fossa exploration

Comment:

There may be sensory impairment in the distribution of the appropriate trigeminal division. 13.1.2 Symptomatic trigeminal neuralgia demonstrates no refractory period after a paroxysm, unlike 13.1.1 Classical trigeminal neuralgia.

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