<prompt> Hyponatremia in multiple myeloma is -TRUERelativeAbsolutePseudo  <response>: Patients with multiple myeloma also have a decreased anion gap because the M component is cationic, resulting in retention of chloride. This is often accompanied by hyponatremia that is felt to be artificial Pseudohyponatremia because each volume of serum has less water as a result of the increased protein. 