APOE and membranous glomerulonephritis: On the other hand, LPG is a heterogenous disease in pathology, especially the recently discovered mutation APOE‐Toyonaka with membranous nephropathy‐like kidney pathology (Fukunaga et al., 2018; Hirashima et al., 2018), suggesting that genetic factor is significant in LPG (Saito et al., 2020).