Pathology General c281e5fa Mesangial deposition of electron dense substance seen in? A IgA nephropathy B Membranous nephropathy C Minimal change disease D Post streptococcal glomerulonephritis High-Yield Explanation Ans. is 'a' i.e., IgA nephropathyIgA Nephropathy: shows presence of electron dense deposits in the mesangium.