This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
IgA nephropathy has all the following characteristics except - 
Select and explain. 
A. Hematuria, B. Hypeension, C. Nephritic syndrome, D. Thin basement membrane on renal biopsy
D: Thin basement membrane on renal biopsy
Answer: D: Thin basement membrane on renal biopsy 
Explanation: Histologically, the lesions in IgA nephropathy vary considerably. The glomeruli may be normal or may show mesangial widening and segmental inflammation confined to some glomeruli (focal proliferative GN); diffuse mesangial proliferation (mesangioproliferative GN); or (rarely) ove crescentic GN. The characteristic immunofluorescence picture is of mesangial deposition of IgA, often with C3 and properdin and smaller amounts of IgG or IgM. Ref: Robbins basic pathology 9th edition page 530