SIADH is characterized by decreased serum osmolality with inappropriate urinary concentration (Larsen et al., 2003). ADH acts on the distal collecting duct tubules resulting in increased water ...
We describe a case of a patient presenting with the syndrome of inappropriate hormone secretion (SIADH) caused by Lyme ... her hyponatremia demonstrated serum osmolality of 250 mOsm/kg (285-300 ...