Is renal failure and renal insufficiency the same?

ARF (acute renal failure) can NOT cause a positive for cocaine on a drug test.

Chronic renal failure is irreversible, and will eventually lead to total kidney failure, also known as end-stage renal disease

Chronic renal failure affects over 250,000 Americans annually

Chronic renal failure is irreversible, and will eventually lead to total kidney failure

Not renal failure per say, but you can see if you have shrunken, scarred or swollen kidneys that can indicate renal dysfunction.