Arnica Montana and Bellis Perennis for Prevention of Seroma After Mastectomy

Inclusion Criteria: * Female patients, aged over 18 years. * Patients underwent mastectomy, either for breast cancer or for risk reduction, followed by immediate breast reconstruction. * All subjects signed informed consent forms. - Exclusion Criteria: * Conditions which could affect wound-healing * Coagulation problems (autoimmune and hematological diseases, etc.) * Medication which affects the immunological or hematological system (steroids, anticoagulants, chemotherapeutic agents, etc.) * Unbalanced background diseases. * Active smokers were instructed to stop smoking at least three weeks prior to surgery and a month postoperatively.