PT  - JOURNAL ARTICLE
AU  - Nogues, Juan Carlos
AU  - Cox, Robert
AU  - Mulcahy, Collin
AU  - Benito, Daniel
AU  - Goodman, Joseph
TI  - Incidentally discovered severe hypercalcaemia from a functioning parathyroid cyst: the limitations of intraoperative parathyroid hormone (IOPTH) monitoring
AID  - 10.1136/bcr-2020-239119
DP  - 2021 May 01
TA  - BMJ Case Reports
PG  - e239119
VI  - 14
IP  - 5
4099  - http://casereports.bmj.com/content/14/5/e239119.short
4100  - http://casereports.bmj.com/content/14/5/e239119.full
SO  - BMJ Case Reports2021 May 01; 14
AB  - Parathyroid cysts (PCs) are rare pathologies and are typically non-functional (do not secrete parathyroid hormone (PTH)). The aetiology of PCs is highly debated, and management is complex. We present a unique case of a parathyroid adenoma contained within a functional PC and highlight the limitations of intraoperative PTH monitoring during the surgical resection of functional PCs.