To know the etiology of neuropathic pain (NP) and the utility of MRI for differential diagnosis.
To provide spectrum of imaging features of these entities.
To analize the future directions of the role of new MRI techniques for characterization if the NP (functional MRI,
Diffusion tensor MRI tractography).
It was defined by IASP (International Association for the Study of Pain) in 1994 as a consequence of injury or disease affecting the somatosensory system.
So NP refers to pain that originates from injury or disfuncion of the nervous system,
including diseases of the peripheral or central nervous system. The patient with neuropathic pain may have concomitant non-neuropathic pain and it should be consider that NP may be the first manifestation of a systemic disease. A wide variety of...
Imaging findings OR Procedure details
Fields in 1991 proposed a classification of NP,
into four groups. - Mononeuropathy: post-traumatic neuromas,
nerve root compression and idiopathic neuropathies as trigeminal neuralgia. - Polyneuropathies: ischemic,
metabolic (diabetic neuropathy),
etc. - Deafferentation pain: postherpetic neuralgia,
amputation neuromas phantom limb pain syndrome and central pain syndrome. - Complex Regional Pain Syndrome type1 (Reflex Sympathetic Dystrophy –RSD-) and type 2 (Causalgia). Another classification...
Multiple mechanisms can cause NP.
MRI plays a key role in diagnosis and management of these structural and functional pathologies.
The development of MRI methods will provide a new approach in the study of NP syndromes.
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TAO Wei and LI Yong-jieChinese...