X-ray is essential to rule out various causes of<unk>  such as hyperparathyroidism, malignancy, and sarcoidosis.
Hypercalcemia x ray
Hypocalcemia x ray
Hyperparathyroidism x ray
Anemia of chronic disease x ray
Adrenal insufficiency x ray
Hypocalcemia CT
Failure to thrive x ray
Hematuria x ray