A 30-year-old white male presented with hematuria, proteinuria and nor
mal renal function following a flu-like illness, IgA was mildly elevat
ed but C3 and C4 levels were normal in serum, Renal biopsy showed a me
sangial proliferative nephritis with immunohistochemical features of I
gA nephritis but with an unusual pattern and distribution of deposits
in glomerular, tubular and Bowman's capsular basement membranes.