Parathyroid hormone is a career criminal. In addition to buoying dropping blood calcium levels via legitimate means, it illegitimately achieves this by stealing it from our bones. But you wouldn’t know it – because like all career criminals this occurs completely under the radar. Elevated PTH, however, constitutes the most modifiable risk factor for bone mineral density loss & fracture risk and offers the biggest BMD gains secondary to its normalisation. In addition to this, even within range but ‘high-normal’ PTH correlates with a range of other cardiovascular and urinary presentations & if combined with elevated serum calcium can become a multi-systemic presentation (GIT, Mental health etc) frequently mistaken for other aetiologies. So how can we be alert to this ‘bone thief’? Which of our patients will benefit the most from PTH measurement and monitoring? This recording, resource & video tutorial on how to use the Ca PTH Nomogram, answers all!