Breast Cancer Clinical Trial
Official title:
Incidence and Factors Affecting the Development and Outcome of Post Mastectomy Pain Syndrome - A Multi-centre Prospective Cohort Study.
Phase 1 of this multi-centre, prospective study aims to obtain a precise estimate of the local incidence of PMPS and identify biopsychosocial risk factors contributing to the development of PMPS. Recognition of the impact of PMPS on function and mood and quality of life in cancer survivors, and identification of risk factors would help physicians institute appropriate pre-operative counselling and preventive measures to reduce the development of PMPS. The investigators aim to follow up on the long-term multi-dimensional effects of PMPS, and continue to develop and validate a risk prediction model for patients at risk of PMPS in the next phase of the study.
Post-mastectomy pain syndrome (PMPS) has been reported to occur in 25-60% of patients following surgeries for breast cancer, the highest occurring cancer in women worldwide. There is a lack of an accepted standard definition of PMPS which has resulted in the wide range of estimates of its occurrence. While there has been much research interest in this condition, there is still a paucity of standardized and effective treatment at this point, and our understanding of this condition, its exact incidence and risk factors, is still incomplete. The local incidence of PMPS after breast cancer surgery is presently unknown and often under-reported, although breast cancer surgery is common and is carried out in almost all Singhealth institutions. Risk factors for PMPS in the local context may differ from that postulated in the West due to cultural, racial and societal differences. Breast cancer has a high survival rate, with data from the CONCORD-2 study showing a 5-year survival rate of ≥85%in developed countries. Despite high survival rates in cancer survivors, PMPS has been shown to have a negative impact on the quality of recovery(QoR), patient satisfaction, and can be severe enough causing the diminished quality of life (QoL) including poor sleep, long-term disability, mood disorders and interference with activities of daily living (ADL). Despite widespread recognition of PMPS, it is often untreated or undertreated. Some possible reasons suggested for inadequate management of PMPS are the lack of quality information about optimal treatment, and incomplete understanding of the mechanisms and risk factors for chronic pain development and prognosis. There is therefore a knowledge gap in the understanding of risk factors leading to PMPS, the lack of a validated risk prediction model for development of PMPS, and hence limiting the institution of preventive analgesia in high risk patients. It is therefore timely to conduct a local multi-centre, prospective study to look at the local incidence of PMPS after breast surgery, the multi-dimensional effects of PMPS on the patient as well as to identify modifiable biopsychosocial risk factors leading to PMPS. ;
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