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
[{'content': 'IgA nephropathy has all the following characteristics except - \nSelect and explain. \nA. Hematuria, B. Hypeension, C. Nephritic syndrome, D. Thin basement membrane on renal biopsy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]