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Eur J Endocrinol. 2011 Sep;165(3):477-83. doi: 10.1530/EJE-11-0003. Epub 2011 Jun 7.

CDC73-related hereditary hyperparathyroidism: five new mutations and the clinical spectrum.

Author information

  • 1Endocrine Practice, Molecular Laboratory, Brückenstr.21, 69120 Heidelberg, Germany. karin.frankraue@raue-endokrinologie.de

Abstract

OBJECTIVE:

Hyperparathyroidism-jaw tumour (HPT-JT) syndrome is a rare autosomal dominant cause of benign and malignant parathyroid tumours, ossifying jaw tumours, various cystic and neoplastic renal abnormalities and benign and malignant uterine tumours. Disease-causing mutations have been localised in the tumour suppressor gene CDC73. There is limited information available on the mutations, and resulting phenotypes and long-term follow-up data are especially scarce.

DESIGN:

We analysed the clinical data from 16 patients (including three families) carrying mutations in the CDC73 gene. We describe five new mutations/gene variants, the corresponding phenotypes of these carriers and the long-term follow-up.

METHODS:

The 16 patients were evaluated at an endocrine outpatient clinic and at a surgical department. DNA samples were obtained for sequence analysis of the CDC73 gene.

RESULTS:

Clinical features of HPT-JT syndrome were detected in 13 of the 15 carriers with germline CDC73 mutations. The major features were benign (n=7; 47%) or cancerous (n=3; 20%) HPT-JT was present in eight cases (53%). Most patients had severe hypercalcaemia, and median serum calcium levels were 3.36 mmol/l. A patient with non-secretory parathyroid carcinoma was included. HPT was diagnosed at a median age of 28.5 years. Mutational analysis of the CDC73 gene identified eight sequence changes, three of them have been reported previously, whereas five are novel: c.1346delG, c.88_94delTTCTCCT, the non-coding variants, c.307+5G>T and c.424-5T>C and c.*12C>A of unknown significance.

CONCLUSIONS:

This study significantly increases the information available on the mutations and phenotypes of HPT-JT syndrome.

PMID:
21652691
[PubMed - indexed for MEDLINE]
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