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This article discusses the outcomes of primary membranous nephropathy (PMN) patients who are refractory to immunosuppressants. PMN is a common cause of adult-onset nephrotic syndrome, and current guidelines recommend immunosuppressive therapy. However, a significant proportion of patients do not respond to initial treatment and require rescue therapy. The article presents a systematic review of 18 observational studies that analyzed different rescue therapies for refractory membranous nephropathy. The findings suggest that rituximab, adrenocorticotrophic hormone, and obinutuzumab show promising results, but there is no clear winner. The choice of treatment should be based on individual patient characteristics and side effect profiles. Further controlled studies are needed to investigate these agents. [Extracted from the article]