251. Prevalence and characteristics of gonadoblastoma in a retrospective multi-center study with follow-up investigations of 70 patients with Turner syndrome and a 45,X/46,XY karyotype
- Author
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Daphné Karila, Bruno Donadille, Juliane Léger, Claire Bouvattier, Anne Bachelot, Veronique Kerlan, Sophie Catteau-Jonard, Sylvie Salenave, Frédérique Albarel, Claire Briet, Regis Coutant, Aude Brac De La Perriere, Alexander Valent, Jean-Pierre Siffroi, Sophie Christin-Maitre, CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), CHU Saint-Antoine [AP-HP], Service d'endocrinologie diabétologie pédiatrique [CHU Debré], AP-HP Hôpital universitaire Robert-Debré [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), National Reference Network DSD DevGen, Service d'endocrinologie pédiatrique [CHU Bicêtre], Université Paris-Sud - Paris 11 (UP11)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Centre Hospitalier Régional Universitaire de Brest (CHRU Brest), CHU Lille, Université de Lille, AP-HP Hôpital Bicêtre (Le Kremlin-Bicêtre), Endocrinologie, diabète, maladies métaboliques (CHU Marseille, AP-HM), Assistance Publique - Hôpitaux de Marseille (APHM), Centre de référence des maladies rares de l'hypophyse (HYPO), Service d'Endocrinologie, Diabète et Maladies Métaboliques, Endocrinologie pédiatrique[CHU Angers], Université d'Angers (UA)-Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Hôpital Louis Pradel [CHU - HCL], Hospices Civils de Lyon (HCL), Département de biologie et pathologie médicales [Gustave Roussy], Institut Gustave Roussy (IGR), Analyse moléculaire, modélisation et imagerie de la maladie cancéreuse (AMMICa), Institut Gustave Roussy (IGR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Maladies génétiques d'expression pédiatrique (U933), Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Trousseau [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), CHU Trousseau [APHP], Centre de référence des Maladies Endocriniennes Rares de la Croissance [CHU Saint-Antoine AP-HP] (CRMERC), Service d'Endocrinologie, diabétologie et endocrinologie de la reproduction [CHU Saint-Antoine], Centre de référence des maladies endocriniennes rares de la croissance et du développement [CHU Pitié-Salpêtrière], Service d'Endocrinologie et Médecine de la Reproduction [CHU Pitié-Salpêtrière], Maladies génétiques d'expression pédiatrique [CHU Trousseau] (Inserm U933), UF de Génétique chromosomique [CHU Trousseau], and Couvet, Sandrine
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Adult ,Ovarian Neoplasms ,Adolescent ,Mosaicism ,[SDV]Life Sciences [q-bio] ,Endocrinology, Diabetes and Metabolism ,Karyotype ,Turner Syndrome ,General Medicine ,[SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics ,[SDV] Life Sciences [q-bio] ,Young Adult ,Endocrinology ,[SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics ,Prevalence ,Humans ,Female ,Gonadoblastoma ,Child ,Follow-Up Studies - Abstract
Introduction A gonadectomy is currently recommended in patients with Turner syndrome (TS) and a 45,X/46,XY karyotype, due to a potential risk of gonadoblastoma (GB). However, the quality of evidence behind this recommendation is low. Objective This study aimed to evaluate the prevalence of GB, its characteristics, as well as its risk factors, according to the type of Y chromosomal material in the karyotype. Methods Our study within French rare disease centers included patients with TS and a 45,X/46,XY karyotype, without ambiguity of external genitalia. Clinical characteristics of the patients, their age at gonadectomy, and gonadal histology were recorded. The regions of the Y chromosome, the presence of TSPY regions, and the percentage of 45,X/46,XY mosaicism were evaluated. Results A total of 70 patients were recruited, with a median age of 29.5 years (21.0–36.0) at the end of follow-up. Fifty-eight patients had a gonadectomy, at a mean age of 15 ± 8 years. GB was present in nine cases. Two were malignant, which were discovered at the age of 14 and 32 years, without metastases. Neither the percentage of XY cells within the 45,X/46,XY mosaicism nor the number of TSPY copies was statistically different in patients with or without GB (P = 0.37). However, the entire Y chromosome was frequent in patients with GB (6/9). Conclusions In our study, including a large number of patients with 45,X/46,XY TS, the prevalence of gonadoblastoma is 12.8%. An entire Y chromosome appears as the main risk factor of GB and should favor early gonadectomy. Significant statement About 10% of patients with TS have a karyotype containing Y chromosomal material: 45,X/46,XY. Its presence is related to the risk of GB. Therefore, a prophylactic gonadectomy is currently recommended in such patients. However, the quality of evidence is low. Our objective was to evaluate the prevalence of GB according to the type of Y-chromosomal material. We found a prevalence of GB of 12.8% in a cohort of 70 TS patients. No sign of hyperandrogenism was observed. The entire Y chromosome was the most frequent type of Y-material in patients with GB. As the prognosis of these tumors was good, a delay of surgery might be discussed.
- Published
- 2022