학술논문
Primary hyperparathyroidism as first manifestation in multiple endocrine neoplasia type 2A: an international multicenter study
Document Type
article
Author
Louise Vølund Larsen; Delphine Mirebeau-Prunier; Tsuneo Imai; Cristina Alvarez-Escola; Kornelia Hasse-Lazar; Simona Censi; Luciana A Castroneves; Akihiro Sakurai; Minoru Kihara; Kiyomi Horiuchi; Véronique Dorine Barbu; Francoise Borson-Chazot; Anne-Paule Gimenez-Roqueplo; Pascal Pigny; Stephane Pinson; Nelson Wohllk; Charis Eng; Berna Imge Aydogan; Dhananjaya Saranath; Sarka Dvorakova; Frederic Castinetti; Attila Patocs; Damijan Bergant; Thera P Links; Mariola Peczkowska; Ana O Hoff; Caterina Mian; Trisha Dwight; Barbara Jarzab; Hartmut P H Neumann; Mercedes Robledo; Shinya Uchino; Anne Barlier; Christian Godballe; Jes Sloth Mathiesen
Source
Endocrine Connections, Vol 9, Iss 6, Pp 489-497 (2020)
Subject
Language
English
ISSN
2049-3614
Abstract
Objective: Multiple endocrine neoplasia type 2A (MEN 2A) is a rare syndrome caused by RET germline mutations and has been associated with primary hyperparathyroidism (PHPT) in up to 30% of cases. Recommendations on RET screening in patients with apparently sporadic PHPT are unclear. We aimed to estimate the prevalence of cases presenting with PHPT as first manifestation among MEN 2A i ndex cases and to characterize the former cases. Design and methods: An international retrospective multicenter study of 1085 MEN 2A index cases. Experts from MEN 2 centers all over the world were invited to participate. A total of 19 centers in 17 different countries provided registr y data of index cases followed from 1974 to 2017. Results: Ten cases presented with PHPT as their first manifestation of M EN 2A, yielding a prevalence of 0.9% (95% CI: 0.4–1.6). 9/10 cases were diagnosed with medullary thyroid carcinoma (MTC) in relation to parathyroid surgery and 1/10 was diagnosed 15 years after parathyroid surgery. 7/9 cases with full TNM data were node-positive at MTC diagnosis. Conclusions: Our data suggest that the prevalence of MEN 2A index cases that present with PHPT as their first manifestation is very low. The majority of i ndex cases presenting with PHPT as first manifestation have synchronous MTC and are often n ode-positive. Thus, our observations suggest that not performing RET mutation analysis in patients with apparently sporadic PHPT would result in an extremely low false-negative rate, if no other MEN 2A component, specifically MTC, are found during work-up or resecti on of PHPT.