Neuropathic pain in cancer.

Neuropathic pain in cancer arises following injury to peripheral or central neurons, in a similar manner to such pain arising from a non-cancer injury. Much of our knowledge of neuropathic pain is based on peripheral originating events with little known about central neuropathic pain. This article explores some of the similarities and differences between cancer and non-cancer-related neuropathic pain. The neural pathways, ion channels, receptors and neurotransmitters that potentially can be altered in both neuropathies are the same; however the nature of the injury, the timing, repeated injuries and the co-existence of simultaneous non-neuropathic pain states lead to potential unique constellations of neuroreceptor and neurotransmitter expression in the context of cancer pain. This in turn may lead to different clinical presentation of pain sensations and potentially lead to specific treatment options.