EM:Diffuse loss of footprocessesof visceral epithelial cells No electron-dense deposits
③ EM: Diffuse loss of foot processes of visceral epithelial cells No electron-dense deposits
Massonstain
Masson stain
GNMinimal changeEpitheliumwitheffacedfoot processesNormalbasementCAPmembraneB
Minimal change GN
GNMinimal change
Minimal change GN
(3) Etiology and pathogenesis:unclear1Although the absence ofimmunedepositsSeveral feature point to animmunologic basis
(3) Etiology and pathogenesis: unclear ① Although the absence of immune deposits Several feature point to an immunologic basis