minimal mesangial glomerulonephritis minimal mesangial glomerulonephritis minimal mesangial glomerulonephritis is a type of glomerulonephritis that is seen in 10% to 25% of sle cases and is associated with mild clinical symptoms. immune complexes deposit in the mesangium, with a slight increase in the mesangial matrix and cellularity. minimal mesangial glomerulonephritisspecialtynephrology