A review of recent advances in the management of breast cancer related pain

Distorted body schema after mastectomy with immediate breast reconstruction: a 4-month follow up study

Background

After breast cancer, some patients report residual pain-related upper limb disability without physical impairment. Although pain and altered proprioception are known to affect the working body schema (WBS), there is little available evidence investigating the WBS of breast cancer survivors (BrCS). WBS-body representations in the brain-affect the "neuromatrix" that modulates pain sensitivity and the threshold for threatening stimuli. The aim of this study was to investigate whether WBS was disrupted after mastectomy with immediate breast reconstruction (IBR) for breast cancer and whether pain and proprioceptive changes affected WBS.

Methods

Thirty-five BrCS participated in the 4-month follow-up study. They were observed at 1 and 4 months postoperatively. The main outcome measures were the left right judgement test (LRJT) results, absolute angle error, pectoralis minor length index (PMI), pain, and Quick-Disabilities of the Arm, Shoulder, and Hand (Q-DASH) score. They were measured at each observation, and parametric tests were performed to identify the nature of WBS.

Results

Both the reaction time and accuracy of the hand LRJT were poorer than those of the foot and back LRJT (p < 0.001). The hand LRJT reaction time and accuracy were unchanged over the total follow-up period (p = 0.77 and p = 0.47, respectively). There was a weak correlation between the LRJT reaction time and PMI (r = -0.26, p = 0.07), pain severity (r = 0.37, p = 0.02), and Q-DASH score (r = 0.37, p = 0.02). There was also a weak correlation between LRJT accuracy and Q-DASH score (r = -0.31, p = 0.04). The LRJT accuracy of BrCS who underwent surgery on their dominant side was higher than that of BrCS who underwent surgery on their non-dominant side (p = 0.002). Regression analysis found a weak but significant relationship between the early hand LRJT results and late pain severity (adjusted R² = 0.179, p = 0.007). A similar relationship was found between early hand LRJT results and Q-DASH score (adjusted R² = 0.099, p = 0.039).

Conclusion

To the best of our knowledge, this is the first study providing the nature of WBS after mastectomy with IBR. In this population, it is necessary to postoperatively preserve WBS integrity for pain and upper limb disability.

Persistent post-surgical pain and its relationship to health-related quality of life in Pakistani women after breast cancer surgery

Background

Breast cancer is the most commonly diagnosed cancer in women; it is also the second-leading cause of death from cancer. Persistent pain after breast cancer surgery is a serious clinical problem that negatively impacts the health-related quality of life of breast cancer survivors. Although persistent post-surgical pain following breast cancer surgery has long been under-reported; however, it is less explored in Pakistan's geographical background.

Objective

The study aimed to examine the persistent post-surgical pain after breast cancer surgery and its relationship to health-related quality of life among Pakistani women.

Methods

A descriptive correlational research design was employed in this study. The Brief Pain Inventory Short Form (BPI-SF) was used to assess the persistent post-surgical pain. The Functional Assessment of Cancer Therapy-Breast (FACT-B) was used to measure the health-related quality of life. Data were collected between February and May 2019 from Pakistani women who have undergone breast cancer surgery for at least three months and attended follow-up visits at two tertiary care hospitals in Pakistan. A Spearman's correlation coefficient was used for data analysis.

Results

The study included 91 Pakistani women. The participants were all females, with an average age of 45.6 years (SD = 6.53). The majority received radical mastectomy (n = 84, 92.3%) with adjuvant therapy (n = 91, 100%). The prevalence of breast surgery-related persistent pain was 100%, with 63 (69.2%) rating the pain as moderate to severe and reported neuropathic pain. The data analysis revealed a statistically significant negative correlation between BPI-SF items and FACT-B dimensions (r = -.43, p < 0.01). The participants appeared to show the highest score of the FACT-B in the social/family well-being (M = 16.58, SD = 3.44). The lowest score of the FACT-B was physical well-being (M = 6.98, SD = 6.38).

Conclusion

Persistent post-surgical pain has a negative impact on the health-related quality of life of Pakistani women breast cancer survivors, particularly on their physical well-being. Therefore, follow-up care of breast cancer survivors after treatment completion requires proper persistent pain-relief treatments and interventions to control pain and maintain health-related quality of life in oncology and research in this sphere. This basic knowledge from this study will enlighten the nurses and health care professionals to pay more attention to pain management and regular evaluation of persistent post-surgical pain after breast cancer surgery in order to improve their health-related quality of life.