Dorothy is a 70-year-old female with the following test results:
- Vitamin D = 9 ng/mL (20 - 50 ng/mL)
- Calcium = 7.0 mg/dL (8.5 - 10 mg/dL)
Based upon these values (normal ranges in parenthesis), predict what the parathyroid hormone (PTH) result would be.
Please select the single best answer