Consistent with hyperthyroidism

The most important result is the strongly suppressed TSH (the labs are shown again below). The remainder of the thyroid tests are also consistent with hyperthyroidism (elevated FTI and T3). The tests for parathyroid problems do not rule out a parathyroid process (though the alkaline phosphatase is only very mildly elevated).

                          Patient's value   Reference range
Calcium, total (S)           10.6 mg/dl       8.4 - 10.2
Phosphorus                    4.8 mg/dl        2.7 - 4.5
Alkaline phosphatase (S)      160 U/L           49 - 120
T4, Total (S)                12.2 ug/dl         5 - 11.5
T3 resin uptake (S)            35%                25 - 35
T3, Total (S)                 311 ng/dl        100 - 215
TSH (S)                      <0.1 uU/ml         0.7 -7.0
Free thyroxine index (FTI)   14.6               6 - 11.5

Return to case 1