A 58-year-old female is admitted for a workup for a complaint of neck and low back pain. During admission, you discover that she underwent a renal transplant six years ago. The patient also had blood work collected. When you review the findings, you notice that her serum calcium is elevated at 13.9 (Normal values range from 8.5 to 10.2 mg/dl), her CBC shows a hematocrit of 33%, and haemoglobin of 11.1 g/dl (normal adult female hematocrit Range: 37-47%, normal adult female haemoglobin range: 12-16 g/dl). What could be the underlying cause of her pain and her abnormal lab values? What other assessments would be helpful? What interventions might be considered?