You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Reversible diabetic nephropathy is characterized by: and explain in detail?
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).