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Le Collen L, Barraud S, Braconnier A, Coppin L, Zachar D, Boulagnon C, Deguelte S, Souchon PF, Spodenkiewicz M, Poirsier C, Aubert S, Odou MF, Delemer B. A large extended family with hyperparathyroidism-jaw tumor syndrome due to deletion of the third exon of CDC73: clinical and molecular features. Endocrine 2021; 73:693-701. [PMID: 33999366 DOI: 10.1007/s12020-021-02756-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 05/05/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE We described the phenotype of a large 4-generation family with Hyperparathyrodism-Jaw Tumor syndrome (HPT-JT) associated with a rare deletion of exon 3 of the CDC73 gene. METHODS We collected medical, genetic data on 24 family members descended from a common ancestor carrying a heterozygous deletion of exon 3. RESULTS Thirteen carried the deletion, the penetrance was estimated at 50% at 40 years. Seven patients (39 ± 14.5 years) presented with HPT which could start at 13. Median plasmatic calcium and PTH levels were 3.13 ± 0.7 mmol/L and 115 ± 406 pg/ml, respectively. Kidney disease related to hypercalcemia were present in 57.1% of patients. All seven patients underwent surgery to remove a single parathyroid adenoma. One recurrence occurred 7 years post-surgery. No parathyroid carcinoma has been found to date. We found two atypical parathyroid adenomas. We described an additional somatic variant in exon 1 of gene CDC73 in two tumors. Jaw tumors were not necessarily associated with hyperparathyroidism, as shown in one case. Two kidney cysts were also reported. Variable phenotype expressivity was emphasized by clinical presentations in 2 monozygotic twins: acute hypercalcemia, kidney failure and ossifying fibroma in one twin, versus normocalcemic parathyroid adenoma in the other one. CONCLUSION We report a family carrier of a deletion of exon 3 of the CDC73 gene. This is characterized by a high level of hypercalcemia, deleterious kidney effects and atypical parathyroid adenomas without carcinomas. Onset and intensity of HPT remain unpredictable. The additional somatic mutation found in the parathyroid tumor could lead to these phenotypical variations.
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Affiliation(s)
- Lauriane Le Collen
- Department of Endocrinology Diabetology, University of Reims, Reims, France.
- Inserm/CNRS UMR 1283/8199, Institut Pasteur de Lille, EGID, Lille, France.
| | - Sara Barraud
- Department of Endocrinology Diabetology, University of Reims, Reims, France
- CRESTIC EA 3804, University of Reims Champagne Ardenne, UFR Sciences Exactes et Naturelles, Moulin de La Housse, BP 1039, 51687, Reims Cedex 2, France
| | | | - Lucie Coppin
- Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer - Heterogeneity Plasticity and Resistance to Therapies, F-59000, Lille, France
| | | | | | | | | | | | | | | | - Marie Françoise Odou
- Univ. Lille, Inserm, CHU Lille, U1286 - Infinite - Institute for Translational Research in Inflammation, F-59000, Lille, France
| | - Brigitte Delemer
- Department of Endocrinology Diabetology, University of Reims, Reims, France.
- CRESTIC EA 3804, University of Reims Champagne Ardenne, UFR Sciences Exactes et Naturelles, Moulin de La Housse, BP 1039, 51687, Reims Cedex 2, France.
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