DIFFERENTIAL DIAGNOSIS OF DECREASED ANION GAP

Differential diagnosis of decreased anion gap are : 
-underestimation of sodium level
-lithium toxicity 
-hyperviscosity 
-multiple myeloma 
-paraproteinemia
-pheochromocytoma
-hypercalcemia
-hypermagnesemia
-hypernatremia
-increased cations which are unmeasured
-hypoalbuminemia
​-dilution