Updates on the preventions and management of post-mastectomy pain syndrome beyond medical treatment: a comprehensive narrative review.

BACKGROUND AND OBJECTIVE: With the significant advances in breast cancer treatment, the survival rates have improved. Consequently, improving the quality of life for breast cancer survivors has emerged an important issue. In this study, we examined the management of post-mastectomy pain syndrome (PMPS) in breast cancer patients thorough a comprehensive literature review. We introduce the preventive measures and pharmacotherapy for PMPS in breast cancer patients and discuss the effectiveness of psychosocial interventions. METHODS: We conducted a literature search for relevant articles in Medline ALL, Cochrane Database of Systematic Reviews, Cochrane CENTRAL, Embase, and nine other databases from October 2023 to January 2024. Chronic pain was defined as pain persisting for more than 3 months after breast cancer surgery. The search included terms related to PMPS, psychological interventions, and breast cancer. Data extraction was done independently by two reviewers, and any discrepancies will be discussed to ensure consensus or by a third reviewer. KEY CONTENT AND FINDINGS: Studies have investigated surgical anesthetics, postoperative medications, and surgical procedures for PMPS prevention, but few have focused on treatment. Our literature search about the usefulness of psychosocial interventions yielded two articles, one was about the usefulness of mindfulness and the other was about the efficacy of yoga. CONCLUSIONS: Mindfulness and yoga show potential efficacy for PMPS treatment, but the evidence is limited. More research is needed to confirm these findings and to explore other psychosocial interventions.

Utility of human epidermal growth factor 2 heterogeneity as a prognostic factor in triple-negative breast cancer.

In some cases of human epidermal growth factor 2 (HER2)-negative breast cancer, including triple-negative breast cancer, HER2 expression is sporadically and strongly upregulated, a condition known as HER2 heterogeneity. We investigated the clinicopathological features of patients with HER2 heterogeneity in triple-negative breast cancers treated with neoadjuvant chemotherapy. Thirty-nine patients with triple-negative breast cancer who had undergone preoperative chemotherapy participated in this study. To assess for HER2 heterogeneity, we used dual in situ hybridization slides. We evaluated the association between HER2 heterogeneity and clinicopathological factors such as rates of pathologic complete response (pCR) and of recurrence-free survival. Of the 39 patients, 15 (38.5%) had cancers with HER2 heterogeneity. The pCR rates were 13.3% among patients with HER2 heterogeneity and 20.8% among those with HER2 nonheterogeneity, but the difference was not significant. The recurrence-free survival rate was significantly lower in patients with HER2 heterogeneity than in those without (P = 0.025). HER2 heterogeneity is a significant predictor of poor prognosis in patients with triple-negative breast cancer treated with neoadjuvant chemotherapy.

Identification of MicroRNAs Associated with Histological Grade in Early-Stage Invasive Breast Cancer.

This study aimed to identify microRNAs associated with histological grade using comprehensive microRNA analysis data obtained by next-generation sequencing from early-stage invasive breast cancer. RNA-seq data from normal breast and breast cancer samples were compared to identify candidate microRNAs with differential expression using bioinformatics. A total of 108 microRNAs were significantly differentially expressed in normal breast and breast cancer tissues. Using clinicopathological information and microRNA sequencing data of 430 patients with breast cancer from The Cancer Genome Atlas (TCGA), the differences in candidate microRNAs between low- and high-grade tumors were identified. Comparing the expression of the 108 microRNAs between low- and high-grade cases, 25 and 18 microRNAs were significantly upregulated and downregulated, respectively, in high-grade cases. Clustering analysis of the TCGA cohort using these 43 microRNAs identified two groups strongly predictive of histological grade. miR-3677 is a microRNA upregulated in high-grade breast cancer. The outcome analysis revealed that patients with high miR-3677 expression had significantly worse prognosis than those with low miR-3677 expression. This study shows that microRNAs are associated with histological grade in early-stage invasive breast cancer. These findings contribute to the elucidation of a new mechanism of breast cancer growth regulated by specific microRNAs.