Editing Stones: Diagnosis and Evaluation (section)

====<span style="color:#ff0000">Parathyroid hormone (PTH)</span>====
*'''<span style="color:#ff0000">Indicated as part of the screening evaluation if primary hyperparathyroidism is suspected</span>'''
**'''<span style="color:#ff0000">Primary hyperparathyroidism should be suspected when (3):</span>'''
**#Mid-range PTH despite '''<span style="color:#ff0000">high or high normal serum calcium</span>'''
**#'''<span style="color:#ff0000">Increased urinary calcium</span>'''
**#'''<span style="color:#ff0000">Predominantly calcium phosphate stone composition</span>'''
*'''Measurement of vitamin D levels may be helpful as''' '''low vitamin D levels may mask primary hyperparathyroidism, or contribute to secondary hyperparathyroidism.'''
*A high or high normal intact PTH in these settings should prompt further endocrine evaluation, imaging or referral for consideration of parathyroidectomy.