Unexpected hypercalcemia in a diabetic patient with kidney disease

Table 1 October 2013: laboratory data on first hospitalization; December 2013: laboratory data on second hospitalization before kidney biopsy; January 2014: laboratory data after 1 mo of treatment; February 2014: laboratory data after 2 mo of treatment

Serum chemistries	October 2013	December 2013	January 2014	February 2014
Sodium (mmol/L)	141	136	139	140
Potassium (mmol/L)	38	4.4	4	4.6
Glucose (mg/dL)	139	140	117	145
HbA1c (%)	10.1	9	6.30	7
Proteinuria (mg/24 h)	156	408	328	394
Creatinine (mg/dL)	2.9	3.6	1.83	1.82
eGFR (mL/min per 1.73 m2)	30.69	20.69	42	64
Calcium (mg/dL)	10.05	13.01	8.3	8.1
Phosphorus (mg/dL)	4.6	4.2	3.9	4
PTH (pg/mL)	3.50	5.50	59.76	61.38
VIT D3 (ng/mL)	30.67	21.73	20.50	19.83
AST (U/L)	12	15	17	12
ALT (U/L)	9	8	24	9
ALP (U/L)	89	80	79	86
Hematologic studies
WBC count (x 103/µL)	10.4	13.6	11.2	10.90
Hemoglobin (g/dL)	10	10.6	13.60	12.2
Platelet count (x 103/µL)	448	456	432