Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a common side effect of many anticancer drugs that may cause various symptoms altering the quality of life. We conducted a systematic review to evaluate the peripheral and central nervous system changes associated with CIPN and detected by magnetic resonance imaging (MRI). Medical literature databases (PubMed, Scopus, Thomson Reuters - Web of Science and Embase) were searched for original studies reporting the use of MRI in the evaluation of CIPN. A total of 31 studies were identified and 9 were eligible for analysis. Results indicate few changes of the peripheral nervous system, most CIPN-associated nervous alterations involving pain processing areas and circuits inside the central nervous system. Distinct patterns of pain processing, changes in cerebral perfusion and gray matter density together with chronic activation of somatosensory areas have been observed in patients with CIPN compared to healthy subjects or cancer patients who did not develop CIPN. Identification of vulnerable brain areas and circuits may indicate future targets for novel therapies directed to prevent or treat CIPN. A preexisting vulnerability suggested by a unique pattern of brain activation following nociceptive stimulation prior to chemotherapy could help identify high-risk individuals, candidates to close monitoring and preventive strategies.
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