Breast cancer is the most common cancer diagnosed in women worldwide, and it alone accounts for 30% of cancer in women (1). Death rates for female breast cancers were estimated to be 6.9% in 2020 (2).

Surgery represents the only potentially curative therapeutic intervention for breast cancer patients, and postmastectomy locoregional recurrences (LRRs) were found in 5–25% (3). The sites of LRRs were usually confined to the chest wall (68%) and supraclavicular nodes (41%) (3, 4). The lung, bone, and liver were the most common metastatic sites for breast cancer. A total of 60–70% of metastatic breast cancer patients who eventually died were diagnosed with lung metastasis (5). Unique signal transduction pathways were found for breast tumors to metastasize to the lung, and nine genes have been defined as specific for lung-specific metastasis (6–8). Surgery is the first line choice of treatment. Other treatments (e.g., cryoablation, intraoperative radiotherapy, high-intensity focused therapy, and ultrasound) are used in the experimental/investigational phase, if applicable (3). Radiofrequency ablation (RFA) is a popularity intervention for its advantages of reduction in tumor mass and intraprocedural pain (9). However, adverse events are common with RFA, such as vascular injury (10), atrio-esophageal fistula (11), and deep esophageal ulcers and abscesses (12–15), which seriously affect patients' quality of life. At present, post-RFA wound management is a serious challenge, as the wound is difficult to heal and has to be kept clean by rising with saline water, which is the main conservative approach for wound management. According to traditional Chinese medicine (TCM) theory, Yang and Qi are the driving forces of biological activities in the human body. Deficiencies in Yang and Qi are common in cancer patients (16). Chinese herbal medicine (CHM) has been utilized as a supplementary treatment (17, 18) for breast cancer patients who received a surgical operation (19–21). We report herein the case of a 59-year-old women who had a surgical operation in the year of 2007. The patient was diagnosed with lung metastasis by CT, for which RFA treatment was then performed. Unfortunately, the cancer recurred and the chest ulcer failed to be controlled following interventional therapy. In the absence of further treatment options, the surgeon decided to offer only palliative treatment. The patient developed anxiety and depressed mood. Without further improvement, the patient turned to CHM for help, and she witnessed a stable improvement in her condition, with the sore and ulcer healed.

There are three stages in the wound healing process: inflammation, proliferation, and remodeling, which depend on the host's ability to repair tissue (23). It was proposed that there was an aspect of surgical tumor resection that triggered the outgrowth of otherwise-dormant metastases, leading to the synchronous pattern of relapse during the postoperative period. In general, 10~41% of breast cancer patients experience recurrences, and 10% develop overt metastases relatively soon after tumor eradication (3, 24). There is compelling evidence of an increased risk of anxiety, depression, and suicide, and neurocognitive and sexual dysfunctions in breast cancer survivors compared with women with no prior cancer (25). Clinically relevant symptoms of stress and depression are common shortly after diagnosis and metastatic recurrence, because women feel uncertainty about the future and their cancer may be perceived as life-threatening. The patient mentioned in this case report who suffered from long-term sores and ulcers of breast cancer metastatic recurrence had low quality of life. From the surgeons' perspective, ulcers of breast cancer metastatic recurrence are local inflammation, and they only recommend washing the ulcer with normal saline, but in this case, the ulcer failed to heal for 1 year. This case was complex and difficult to treat. Seeking the help of a doctor was spiritually necessary for the patient. So when the surgeon was helpless or the treatment plan was not ideal, this led to despair in the patient.

The holistic concept is an essential philosophy of TCM. The mind and body together are a dynamic battlefield, in which all the organs and mind are interconnected and bound to each other, and should be considered and treated as a whole, rather than an isolated pathology. In TCM theory, individual health is formed by Yin-Yang; an imbalance between Yin and Yang in the body can render an individual more prone to certain disease (26). This theoretical advantage simplifies the complexity. TCM uses different methodologies to diagnose mental and body disorders. The four diagnostic methods (inspection, listening/smelling, inquiry, and palpation) are the means to obtain patient information. This information is then analyzed using diagnostic models, such as yin/yang, interior/exterior, excess/deficiency, and hot/cold to differentiate the pattern and form a diagnosis. Zhang suggested that the patient's long-term sore and ulcer were due to Qi deficiency; the psychiatric symptoms of the long-term sore and ulcer resulted in emotional upset and stagnation of Qi. These were associated with the impairment of spleen and kidney (Spleen-Yang and Kidney-Yang). Yang-deficiency (e.g., spleen, kidney) may not only be related to hypothalamic-pituitary-adrenal (HPA) axis and hypothalamic-pituitary-thyroid (HPT) axis dysfunction, but also to functional disorders of the cyclic nucleotide and immune systems (27). These factors are involved in depression. The patient's mind and body were affected by the sore and ulcer. Zhang's main treatment goal was to relieve the patient's pain, which could improve the patient's quality of life.

After the malignant lesions had been removed by surgical excision, there was a persistent poor growth of granulation tissue, following delayed wound healing. The patient exhibited middle-staged boils and sores, and the pus was not completely discharged after breaking the ulceration. The patient had a compromised immune function; thus a tonic was used for reinforcing the primordial Qi in order to treat suppurative infection in this situation. This method was named the internal vitality supporting method according to the theory of TCM (22). This therapeutic regimen aimed at strengthening the host's anti-pathogenic ability and removing pathogenic factors via herbs to achieve the goal of canceling the tumefaction and shrinking its base to avoid ulceration.

The ulcer was effectively healed by Chinese herbs via boosting the primordial Qi, conditioning the internal vitality of key viscera to circulate Qi, activating the energy supply, and dispersing the inflammatory blockage. HuangQi (Radix astragali seu Hedysari), DangShen (Radix codonopsis pilosulae), Baizhu (Rhizoma Atractylodis Macrocephalae), Danggui (Radix Angelicae Sinensis), Baizhi (Radix Angelicae Dahuricae), etc., have been documented to modulate the immune response. These were used in inhibiting cancer cell proliferation, arresting the cell cycle, inducing apoptosis, inhibiting epithelial-mesenchymal transition, regulating immune function (28), and exerting antioxidative and anti-inflammatory effects (29) in cells and animal studies. Compared to local treatment therapies for chronic inflammatory skin disease, this herb intervention altered the gut microbiome, taking advantage of the gut-skin axis to control different skin conditions (30). As these herbs encompass a group of substances that produce a therapeutic effect, multiple pathways and receptors were targeted, plenty of compounds were involved, which acted synergistically to improve cancer-related symptoms, enhance vital energy, and boost immunity. What is more, herbs used in traditional medicine can be significantly effective in reducing depression, depressive symptoms, and improving patients' performance via regulating the HPA axis (31). So as the patient witnessed her wound healing, she became more optimistic.

This case was the first description of management of a long-term sore and ulcer of breast cancer metastatic recurrence with the internal vitality supporting method of Chinese herbal medicine. The patient was effectively cured due to cross-disorder and interdisciplinary collaboration. The holistic concept of TCM provided a novel therapeutic strategy for mind–body medicine.

The original contributions presented in the study are included in the article/Supplementary Material, further inquiries can be directed to the corresponding author/s.

Written informed consent was obtained from the relevant individual(s) for the publication of any potentially identifiable images or data included in this article. Written consent and accompanying photos were obtained from the patient and her husband for publication.

YZ drafted the manuscript. BZ treated the patient and provided the case analysis. WZ and YZ provided the critical analysis in preparing this article. TL revised the manuscript. All the authors approved the final version.

This work was supported by the Programs Foundation for Leading Talents in State Administration of Traditional Chinese Medicine of China-Qihuang Scholars Project (10400633210004), the National Natural Science Foundation of China (Grant No. 81874349), and National Special Support Plan for High-Level Talents (Plan of ten thousand people)-Famous Teacher Program to BZ.

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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