All adult cancer survivors should be screened for chronic pain at every visit, according to the American Society of Clinical Oncology’s first clinical practice guideline for managing this patient population, published July 25 in the Journal of Clinical Oncology.
An estimated 14 million adults with a history of cancer are living in the United States alone, and the prevalence of chronic pain related to their malignancy is reported to be as high as 40%. Yet most health care providers “haven’t been trained to recognize or treat long-term pain associated with cancer,” Judith A. Paice, PhD, RN, said in a press statement accompanying the release of the new guideline.
Existing guidelines focus on the acute pain of cancer and its treatment, or on acute pain related to advanced cancer, said Dr. Paice, cochair of the expert panel that developed the guideline and research professor of hematology/oncology at Northwestern University, Chicago.
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The chronic pain addressed in the new guideline document can be related to the malignancy itself or to its treatment. Surgery, chemotherapy, hormone therapy, radiation treatment, and stem-cell transplantation can induce dozens of pain-producing complications, including osteonecrosis, bone fractures, peripheral or central nerve damage, fistulas, lymphedema, arthralgias, and myelopathy. The pain can develop months or years after diagnosis, significantly impacting patients’ quality of life well after treatment is completed.
“This guideline will help clinicians identify pain early and develop comprehensive treatment plans using a broad range of approaches,” Dr. Paice said in the statement.
The panel that developed the guideline comprised experts in medical oncology, hematology, pain medicine, palliative care, hospice, radiation oncology, social work, rehabilitation, psychology, and anesthesiology. They performed a systematic review of the literature and based their recommendations on 35 meta-analyses, 9 randomized controlled trials, 19 comparative studies, and expert consensus.
Some key recommendations include the following:
• Screen all survivors of adult cancers for chronic pain using both a physical exam and an in-depth interview that covers physical, functional, psychological, social, and spiritual aspects of pain, as well as the patient’s treatment history and comorbid conditions. The guideline includes a list of 36 common pain syndromes resulting from cancer treatments.
• Monitor patients at every visit for late-onset treatment effects that can produce pain, just as they are monitored for recurrent disease and secondary malignancy. Some cancer survivors may not recognize that their current pain is related to past disease or its treatments, or may consider it an untreatable complication that they have to endure.
• Consider the entire range of pain medicines – not just opioid analgesics – including NSAIDs, acetaminophen, and selected antidepressants and anticonvulsants with analgesic efficacy. The panel noted that some cancer survivors with chronic pain may benefit from other drugs, including muscle relaxants, benzodiazepines, N-methyl-D-aspartate receptor blockers, alpha-2 agonists, and neutraceuticals and botanicals. But they urged caution since the efficacy of these agents has not been fully established.
Consider nonmedical treatments such as physical, occupational, and recreation therapy; exercise; orthotics; ultrasound; massage; acupuncture; cognitive behavioral therapy; relaxation therapy; and TENS or other types of nerve stimulation.
Consider medical cannabis or cannabinoids as an adjuvant but not a first-line pain treatment, being sure to follow specific state regulations.
Consider a trial of opioids only for carefully selected patients who don’t respond to more conservative management. Weigh potential risks against benefits and employ universal precautions to minimize abuse and addiction, and be cautious in coprescribing other centrally-acting agents (J Clin Oncol. 2016 July 25. doi: 10.1200/JCO.2016.68.5206).
The full clinical practice guideline and other clinical tools and resources are available at www.asco.org/chronic-pai-guideline.
The guideline development process was supported by ASCO. Dr. Paice reported having no relevant financial disclosures; some of her associates reported financial ties to industry sources.