This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Reversible diabetic nephropathy is characterized by: 
Select and explain. 
A. Microalbuminuria, B. Macroalbuminuria, C. Kimmelstiel Wilson lesion, D. Diffuse glomerulosclerosis
A: Microalbuminuria
Answer: A: Microalbuminuria 
Explanation: Microalbuminuria (<300 mg/day or <300mg/d) shows that diabetic nephropathy is reversible. Overt proteinuria ie >300mg/d is usually irreversible. 
The most common histological pattern in DM is Diffuse Glomerulosclerosis. 
The most typical histological pattern in DM is Kimmelstiel-Wilson lesion (nodular glomerulosclerosis).