Edema is a hallmark sign of SIADH caused by fluid shifts into the extracellular space. Clinical manifestations include concentrated urine output and overhydration. A patient is recovering from a lung resection because of malignant bronchogenic small cell carcinoma. His serum sodium is 120 mEq/L and SIADH is suspected. Which statement is accurate regarding SIADH?

A Management includes rapid restoration of serum sodium levels to normal. D Serum sodium levels typically rise in cases of SIADH. B SIADH occurs when excessive ADH is released by the anterior pituitary. C SIADH is characterized by diluted urine output and dehydration.