True about membranous GN are following except -
Membranous glomerulonephritis 

Membranous glomerulonephritis, also known as membranous nephropathy, is a slowly progressive disease of the kidney affecting mostly patients between ages of 30 and 50 years.
Membranous glomerulonephritis is classified


Primary (idiopathic) - 85%
Secondary  - 15%


Drugs → Penicillamine, captopril, gold, NSAIDS
Malignant tumors → Lung, colon, melanoma
Autoimmune conditions → SLE, thyroiditis
Infections → HBC, HCV, syphilis, schistosomiasis, malaria

Membranous glomerulonephritis is characterized by -

Diffuse thickening of the glomerular capillary wall.
Accumulation of electron - dense, immunoglobulin containing deposits along subepithelial side (between epithelium and GBM).
Membranous glomerulonephritis is the most common cause of nephrotic syndrome in adults.
Thickening of B.M
Deposition between endothelium and B.M.
Most common cause of nephrotic syndrome in adults
Seen in SLE, tumors, drugs