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Introduction Lipoedema is a chronic and progressive fat distribution disorder characterised by a symmetrical disproportional increase of adipose tissue on the extremities. The disorder is most commonly associated with pain, oedemas, increased tendency of bruising, as well as sensory dysfunctions on the affected limbs, resulting in severely reduced quality of life (QoL) for exclusively female patients. According to current clinical guidelines, conservative treatment of lipoedema consists of manual lymphatic drainage, compression garments, or both combined as complex decongestive therapy (CDT). If conservative therapy does not result in sufficient improvement of symptoms, a surgical intervention, in the form of liposuction under tumescence anaesthesia, may be indicated. This systematic review aims to assess the clinical effectiveness and safety of liposuction in patients with lipoedema (stage I-III) in comparison to any conservative treatment, concerning patient-relevant outcomes, as reduction of pain, reduction in the size of extremities, improvement of QoL, and procedure-related adverse events. Methods A systematic literature search was conducted in December 2020 in five databases to answer customised research questions on clinical effectiveness and safety-related outcomes, yielding in overall 294 potentially relevant hits. One additional hit was identified by hand search. The study selection, data extraction, and assessment of the methodological quality of the studies were performed by two independent researchers. Results A total of six prospective and one retrospective single-arm before/after studies were eligible for inclusion in the current report. Overall, data on safety and clinical effectiveness were evaluated in 492 and 467 female patients of all three lipoedema stages, respectively. The post-operative follow-up ranged from six months to twelve years. Clinical effectiveness Due to the lack of controlled trials, no conclusions on the comparative clinical effectiveness of liposuction for lipoedema could be made. Therefore, data from the prospective single-arm studies comparing patient-reported complaints before and after the liposuction were analysed. All six prospective studies reported statistically significant improvements in pain outcomes pre- vs post-liposuction. These effects were reported beginning at a six-month follow-up but also up to twelve years after the intervention. Reduced sizes of patients’ extremities before-and-after liposuction were reported in three of the included studies, in terms of reduced leg volume and circumference of lower extremities. Statistically significant changes in lipoedema-related QoL outcomes were reported by four studies. Further, reduction in complaints about oedema/swelling, bruising and sensory dysfunctions were reported in some of the included studies.