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 deposition in mesangial cells arr seen in 
Select and explain. 
A. Good Pasteur syndrome, B. Berger syndrome, C. Cresentic glomerulonephritis, D. Alpo syndrome
B: Berger syndrome
Answer: B: Berger syndrome 
Explanation: Refer Robbins page no 923 IgA Nephropathy (Berger Disease) IgA nephropathy, characterized by the presence of prom- inent IgA deposits in the mesangial regions and recurrent hematuria, is the most common type of glomerulonephri- tis worldwide. The disease can be suspected by light microscopic examination, but the diagnosis is made only by the detection of glomerular IgA deposition (Fig. 20-19). Mild proteinuria is usually present, and the nephrotic syndrome may occasionally develop.