Table 3.

Evaluation of the Causes of Hypoparathyroidism

Destruction of parathyroid tissue
Postsurgical	No surgery
Postradiation	No radiation
Autoimmune	Autoimmune workup negative; no other endocrine insufficiencies
Heavy metal deposition	Ferritin level elevated at 530.9 ng/mL but normal saturation percentage
Reversible causes
Hypomagnesemia	Magnesium level within normal limits
Genetic causes	No family history
Malignancy	CT of the chest with contrast, unremarkable; CT of the abdomen and pelvis with contrast, unremarkable; CT of the neck, unremarkable. PTH-rP level, 11 pg/mL (reference range, 14-27 pg/mL)
Sarcoidosis	CT of the chest and abdomen with no signs of lymphadenopathy; ACE level, 44 U/L (reference range, 9-67 U/L)

Abbreviations: ACE = angiotensin-converting enzyme; CT = computed tomography; PTH-rP = parathyroid hormone–related protein.