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Parathyroid hormone (PTH) related hypercalcaemia is most commonly caused by primary hyperparathyroidism (PHPT) and more rarely by familial hypocalciuric hypercalcaemia (FHH). Algorithms for diagnosis of PTH related hypercalcaemia require assessment of a 24-h urinary calcium and creatinine excretion to calculate calcium\/creatinine clearance ratio and radiological investigations including ultrasound scan and<jats:sup>99m<\/jats:sup>Tc-sestamibi-SPECT\/CT. To illustrate investigations and management of parathyroid-related hypercalcaemia, we present a selection of distinct cases of PHPT due to eutopic and ectopic parathyroid adenomas, as well as a case with a syndromic form of PHPT (multiple endocrine neoplasia type 1), and a case with FHH type 1 due to a<jats:italic>CASR<\/jats:italic>inactivating mutation. Additional cases with normocalcaemic hyperparathyroidism and secondary hyperparathyroidism are included for completeness of differential diagnosis. The common eutopic parathyroid adenomas are easily treated with parathyroidectomy while the less common ectopic parathyroid adenomas require more complex investigations and operative procedures such as video-assisted thoracoscopic surgery. On the other hand, the much less common FHH does not require treatment. Assessment of kin with FHH is important to identify members with this inherited condition in order to prevent unnecessary interventions.<\/jats:p>","DOI":"10.1007\/s11154-019-09529-5","type":"journal-article","created":{"date-parts":[[2019,12,3]],"date-time":"2019-12-03T09:03:06Z","timestamp":1575363786000},"page":"77-88","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["A clinical perspective of parathyroid hormone related hypercalcaemia"],"prefix":"10.1007","volume":"21","author":[{"given":"Chau H.","family":"Han","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher H.","family":"Fry","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pankaj","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2570-0938","authenticated-orcid":false,"given":"Thang S.","family":"Han","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2019,12,3]]},"reference":[{"key":"9529_CR1","doi-asserted-by":"publisher","first-page":"F485","DOI":"10.1152\/ajprenal.00608.2009","volume":"298","author":"D Riccardi","year":"2010","unstructured":"Riccardi D, Brown EM. 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