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A 47-year-old woman with a history of breast cancer presents with confusion and dehydration. The serum calcium level is 18.0 mg per deciliter. She has postural hypotension and low central venous pressure. The serum phosphorus level is 5.0 mg per deciliter, the blood urea nitrogen level 80 mg per deciliter, the serum creatinine level 2.0 mg per deciliter, and the albumin level 3.3 g per deciliter. Bone scintigraphy reveals no evidence of skeletal involvement by the tumor. How should she be treated?
Andrew F. Stewart (Wed,) studied this question.