<prompt> Most common type of lupus nephritis-MemberanousMesangialFocal proliferativeDiffuse proliferative  <response>: Diffuse proliferative glomerulonephritis DPGN is a term used to describe a distinct histologic form of glomerulonephritis common to various types of systemic inflammatory diseases, including autoimmune disorders eg, systemic lupus erythematosus , vasculitis syndromes eg, granulomatosis with polyangiitis, and infectious processes. In DPGN, more than 50 of the glomeruli diffuse show an increase in mesangial, epithelial, endothelial proliferative, and inflammatory cells ie, glomerulonephritis. Increased cellularity is demonstrated in the image below 