Hyponatremia with Isovolemia is seen in-: (A) SIADH, (B) Conn's syndrome, (C) Cushing' syndrome, (D) Frusemide therapy
Answer is A. The syndrome of inappropriate secretion of antidiuretic hormone (SIADH) is a disorder of impaired water excretion caused by the inability to suppress the secretion of antidiuretic hormone (ADH) . If water intake exceeds the reduced urine output, the ensuing water retention leads to the development of hyponatremia Ref Davidson 23rd edition pg 366