Metastatic breast cancer has a poor prognosis. The validated anticancer drugs used so far are unable to reverse the metastatic spread and consequently the progression of the disease. Recently, it has come to light that the combined use of clinically-relevant anticancer treatments in association with natural substances, acupuncture techniques and adequate nutrition, can lead to the resolution of cases with metastatic diffusion. We herein report the case of a 72-year-old woman who, after a radical mastectomy surgery for breast cancer in 2000 and hormone therapy until 2009, presented a pulmonary recurrence in 2014. For this reason, the patient underwent an integrated therapy, combining the standard oncological treatment with the use of herbal medicine, minerals and mushroom therapy, acupuncture and nutritional counseling. This not only permitted an improvement in her quality of life, with reduction of pain and analgesic intake, but also led to the metabolic disappearance of secondary neoplastic lesions. The case focuses the importance of integrative approaches for cancer patients in a conventional medical setting.