Which of the following condition is not associated with an increased anion gap?: (A) Salicylate poisoning, (B) Proximal A, (C) Ethylene glycol poisoning, (D) Lactic acidosis
Answer is B. Both proximal and distal A causes normal anion gap metabolic acidosis. Normal anion gap is 8 - 12 mEq/L. Conditions associated with increased anion gap acidosis are lactic acidosis, ketoacidosis, ingestion of toxins ( alcohol, ethylene glycol, methanol, isopropyl alcohol), acute and chronic renal failure.