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Endocrine Abstracts (2021) 73 EP33 | DOI: 10.1530/endoabs.73.EP33

ECE2021 Eposter Presentations Calcium and Bone (21 abstracts)

Hyperparathyroidism complicating a pre-existing diagnosis of Familial Hypocalciuric Hypercalcemia (FHH)

Alamin Alkundi & Rabiu Momoh


William Harvey Hospital, Kent, UK


Familial hypocalciuric hypercalcemia is a rare clinical condition of persistently elevated serum calcium and reduced urinary calcium levels with an autosomal dominance inheritance pattern to the three out of four large types of this condition known. This rare condition goes largely undiagnosed as patients are largely asymptomatic and where symptoms are present, other causes of hypercalcaemia are considered first. Hyperparathyroidism, super-imposing on FHH, is an even rarer occurrence. We present the case of an adult male with an initial provisional assessment of FHH, which was later confirmed with a genetic study. He went on to develop hyperparathyroidism (with evident parathyroid hypertrophy on Sestamibi parathyroid scan done). This occurred on his pre-existing familial hypocalciuric hypercalcemia and surgical consideration (subtotal parathyroidectomy) was offered. It remains to be established if this is an incidental occurrence or if there is a causal relationship between FHH and an onward development of parathyroid hypertrophy or adenoma(ta).

Volume 73

European Congress of Endocrinology 2021

Online
22 May 2021 - 26 May 2021

European Society of Endocrinology 

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