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      Journal of Pain Research (submit here)

      This international, peer-reviewed Open Access journal by Dove Medical Press focuses on reporting of high-quality laboratory and clinical findings in all fields of pain research and the prevention and management of pain. Sign up for email alerts here.

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      Can treatment success with 5% lidocaine medicated plaster be predicted in cancer pain with neuropathic components or trigeminal neuropathic pain?

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          Abstract

          An expert group of 40 pain specialists from 16 countries performed a first assessment of the value of predictors for treatment success with 5% lidocaine-medicated plaster in the management of cancer pain with neuropathic components and trigeminal neuropathic pain. Results were based on the retrospective analysis of 68 case reports (sent in by participants in the 4 weeks prior to the conference) and the practical experience of the experts. Lidocaine plaster treatment was mostly successful for surgery or chemotherapy-related cancer pain with neuropathic components. A dose reduction of systemic pain treatment was observed in at least 50% of all cancer pain patients using the plaster as adjunct treatment; the presence of allodynia, hyperalgesia or pain quality provided a potential but not definitively clear indication of treatment success. In trigeminal neuropathic pain, continuous pain, severe allodynia, hyperalgesia, or postherpetic neuralgia or trauma as the cause of orofacial neuropathic pain were perceived as potential predictors of treatment success with lidocaine plaster. In conclusion, these findings provide a first assessment of the likelihood of treatment benefits with 5% lidocaine-medicated plaster in the management of cancer pain with neuropathic components and trigeminal neuropathic pain and support conducting large, well-designed multicenter studies.

          Most cited references50

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          Incidence of facial pain in the general population.

          Facial pain has a considerable impact on quality of life. Accurate incidence estimates in the general population are scant. The aim was therefore to estimate the incidence rate (IR) of trigeminal neuralgia (TGN), postherpetic neuralgia (PHN), cluster headache (CH), occipital neuralgia (ON), local neuralgia (LoN), atypical facial pain (AFP), glossopharyngeal neuralgia (GPN) and paroxysmal hemicrania (PH) in the Netherlands. In the population-based Integrated Primary Care Information (IPCI) medical record database potential facial pain cases were identified from codes and narratives. Two medical doctors reviewed medical records, questionnaires from general practitioners and specialist letters using criteria of the International Association for the Study of Pain. A pain specialist arbitrated if necessary and a random sample of all cases was evaluated by a neurologist. The date of onset was defined as date of first specific symptoms. The IR was calculated per 100,000PY. Three hundred and sixty-two incident cases were ascertained. The overall IR [95% confidence interval] was 38.7 [34.9-42.9]. It was more common among women compared to men. Trigeminal neuralgia and cluster headache were the most common forms among the studied diseases. Paroxysmal hemicrania and glossopharyngeal neuralgia were among the rarer syndromes. The IR increased with age for all diseases except CH and ON, peaking in the 4th and 7th decade, respectively. Postherpetic neuralgia, CH and LoN were more common in men than women. From this we can conclude that facial pain is relatively rare, although more common than estimated previously based on hospital data.
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            Neuropathic pain: quality-of-life impact, costs and cost effectiveness of therapy.

            A number of different diseases or injuries can damage the central or peripheral nervous system and produce neuropathic pain (NP), which seems to be more difficult to treat than many other types of chronic pain. As a group, patients with NP have greater medical co-morbidity burden than age- and sex-adjusted controls, which makes determining the humanistic and economic burden attributable to NP challenging. Health-related quality of life (HR-QOL) is substantially impaired among patients with NP. Patients describe pain-related interference in multiple HR-QOL and functional domains, as well as reduced ability to work and reduced mobility due to their pain. In addition, the spouses of NP patients have been shown to experience adverse social consequences related to NP. In randomized controlled trials, several medications have been shown to improve various measures of HR-QOL. Changes in HR-QOL appear to be tightly linked to pain relief, but not to the development of adverse effects. However, in cross-sectional studies, many patients continue to have moderate or severe pain and markedly impaired HR-QOL, despite taking medications prescribed for NP. The quality of NP treatment appears to be poor, with few patients receiving recommended medications in efficacious dosages. The substantial costs to society of NP derive from direct medical costs, loss of the ability to work, loss of caregivers' ability to work and possibly greater need for institutionalization or other living assistance. No single study has measured all of these costs to society for chronic NP. The cost effectiveness of various interventions for the treatment or prevention of different types of NP has been assessed in several different studies. The most-studied diseases are post-herpetic neuralgia and painful diabetic neuropathy, for which tricyclic antidepressants (both amitriptyline and desipramine) have been found to be either cost effective or dominant relative to other strategies. Increasing the use of cost-effective therapies such as tricyclic antidepressants for post-herpetic neuralgia and painful diabetic neuropathy may improve the HR-QOL of patients and decrease societal costs. Head-to-head clinical trials comparing NP therapies are needed to help assess the relative clinical efficacy of treatments, ideally using HR-QOL and utility outcomes. The full costs to society of NP, including productivity loss costs, have not been determined for chronic NP. Improved relative efficacy, utility and cost estimates would facilitate future cost-effectiveness research in NP.
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              An international survey of cancer pain characteristics and syndromes. IASP Task Force on Cancer Pain. International Association for the Study of Pain.

              The optimal assessment of cancer pain includes a detailed description of pain characteristics and classification by both syndrome and likely mechanisms. In the clinical setting, the interpretation of this information is aided by knowledge of the available clinical experiences on these aspects of the pain. Unfortunately, existing data are limited. There have been few large surveys of cancer pain characteristics and syndromes, and comparative data from patients in different parts of the world are entirely lacking. To better define the characteristics of cancer pain syndromes the Task Force on Cancer Pain of the International Association for the Study of Pain (IASP) conducted a prospective, cross-sectional, international, multicenter survey of pain specialists and their patients. From a total of 100 clinicians who described themselves as cancer pain practitioners in the IASP membership directory, 51 agreed to participate in the survey and a total of 58 provided data. These clinicians resided in 24 countries and evaluated a total of 1095 patients with severe cancer pain mostly requiring opioid medication, using a combination of patient-rated and observer-rated measures. The patient-rated scales comprised a pain intensity measure chosen from the brief pain inventory. The observer-rated information included demographic and tumor-related data, and responses on checklists of pain syndromes and pathophysiologies. Patients were heterogeneous in terms of demographics and tumor-related information. More than 76% had a Kamofsky performance status score or = 7 on a 10-point numeric scale. The factors that were univariately associated with higher pain intensity included the presence of breakthrough pain, somatic pain or neuropathic pain, age younger than 60 years, and lower performance status score. A multivariate model suggested that the presence of breakthrough pain, somatic pain, and lower performance status were the most important predictors of intense pain. Pains that were inferred by the treating clinician to be nociceptive and due to somatic injury occurred in 71.6% of the patients. Pains labeled nociceptive visceral were noted in 34.7% and pains inferred to have neuropathic mechanisms occurred in 39.7%. In a broad classification, the major pain syndromes comprised bone or joint lesions (41.7% of patients), visceral lesions (28.1%), soft tissue infiltration (28.3%), and peripheral nerve injuries (27.8%). Twenty-two types of pain syndromes were most prevalent. Large differences in the diagnosis of breakthrough pain by clinicians of different countries suggest that this phenomenon is either defined or recognized differently across countries. These data confirm, in segment of the cancer population experiencing severe pain, in different parts of the world, that cancer pain characteristics, syndromes and pathophysiologies are very heterogeneous. Predictors of worsening pain can be identified. The data provide a useful context for the interpretation of pain-related information acquired in both clinical and research settings. They suggest the need for future studies and the potential usefulness of a written checklist for cancer pain syndromes and pathophysiologies.
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                Author and article information

                Journal
                J Pain Res
                J Pain Res
                Journal of Pain Research
                Dove Medical Press
                1178-7090
                2013
                05 April 2013
                : 6
                : 261-280
                Affiliations
                [1 ]Institute for Pain Medicine, Wiesbaden, Germany
                [2 ]International Clinical Research Institute, Overland Park, KS, USA
                [3 ]Institut Curie, Saint Cloud, France
                [4 ]Eastman Dental Hospital, University College London Hospitals, London, UK
                Author notes
                Correspondence: Kai-Uwe Kern, Institut für Schmerzmedizin/Schmerzpraxis Wiesbaden, Sonnenberger Strasse 68, 65193 Wiesbaden, Germany, Tel +49 611 2059 2636, Fax +49 611 2059 2637, Email dr.kern@ 123456schmerzpraxis-wiesbaden.de
                Article
                jpr-6-261
                10.2147/JPR.S39957
                3623573
                23630431
                94f9aa75-78f2-40ee-9dc0-5daf070c6e6a
                © 2013 Kern et al, publisher and licensee Dove Medical Press Ltd.

                This is an Open Access article which permits unrestricted noncommercial use, provided the original work is properly cited.

                History
                Categories
                Case Series

                Anesthesiology & Pain management
                lidocaine plaster,neuropathic pain,cancer pain,trigeminal neuropathic pain,case reports

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