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Felix Haglund Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Gustaf Rosin Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Inga-Lena Nilsson Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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C Christofer Juhlin Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Ylva Pernow Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Sophie Norenstedt Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Andrii Dinets Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Catharina Larsson Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Johan Hartman Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Anders Höög Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden
Department of Oncology–Pathology, Cancer Centre Karolinska, Department of Biosciences and Nutrition, Department of Molecular Medicine and Surgery, Department of Surgery #4, Karolinska Institutet, Stockholm, Sweden

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Primary hyperparathyroidism (PHPT) is a common endocrinopathy, frequently caused by a parathyroid adenoma, rarely by a parathyroid carcinoma that lacks effective oncological treatment. As the majority of cases are present in postmenopausal women, oestrogen signalling has been implicated in the tumourigenesis. Oestrogen receptor beta 1 (ERB1) and ERB2 have been recently identified in parathyroid adenomas, the former inducing genes coupled to tumour apoptosis. We applied immunohistochemistry and slide digitalisation to quantify nuclear ERB1 and ERB2 in 172 parathyroid adenomas, atypical adenomas and carcinomas, and ten normal parathyroid glands. All the normal parathyroid glands expressed ERB1 and ERB2. The majority of tumours expressed ERB1 (70.6%) at varying intensities, and ERB2 (96.5%) at strong intensities. Parathyroid carcinomas expressed ERB1 in three out of six cases and ERB2 in five out of six cases. The intensity of tumour nuclear ERB1 staining significantly correlated inversely with tumour weight (P=0.011), and patients whose tumours were classified as ERB1-negative had significantly greater tumour weight as well as higher serum calcium (P=0.002) and parathyroid hormone levels (P=0.003). Additionally, tumour nuclear ERB1 was not expressed differentially with respect to sex or age of the patient. Levels of tumour nuclear ERB2 did not correlate with clinical characteristics. In conclusion, decreased ERB1 immunoreactivity is associated with increased tumour weight in parathyroid adenomas. Given the previously reported correlation with tumour-suppressive signalling, selective oestrogen receptor modulation (SERMs) may play a role in the treatment of parathyroid carcinomas. Future studies of SERMs and oestrogen treatment in PHPT should consider tumour weight as a potential factor in pharmacological responsiveness.

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Willem de Ronde Department of Internal Medicine, Spaarne Gasthuis, Haarlem, the Netherlands

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Diederik L Smit Department of Internal Medicine, Spaarne Gasthuis, Haarlem, the Netherlands

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finding elevated gonadotropins and low testosterone levels, the patient should be questioned about current use of aromatase inhibitors or selective oestrogen receptor modulators. If this is denied, other, steroid unrelated causes of gonadal dysfunction

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Jasmin Asberger Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Thalia Erbes Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Markus Jaeger Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Gerta Rücker Institute of Medical Biometry and Statistics, Medical Center – University of Freiburg, Freiburg, Germany

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Claudia Nöthling Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Andrea Ritter Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Kai Berner Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Ingolf Juhasz-Böss Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany

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Marc Hirschfeld Department of Obstetrics and Gynecology, Medical Center – University of Freiburg, Freiburg, Germany
Faculty of Medicine, University of Freiburg, Freiburg, Germany
Institute of Veterinary Medicine, Georg-August-University Goettingen, Goettingen, Germany

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can be categorized according to different endocrine effects: selective oestrogen-receptor modulators (SERMs), aromatase inhibitors (AIs), and selective estrogen-receptor downregulator (SERD) ( 7 ). The selective oestrogen receptor modulator (SERM

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Laurent Maïmoun Département de Médecine Nucléaire, Hôpital Lapeyronie, Centre Hospitalier Régional Universitaire (CHU) Montpellier, Montpellier, France
PhyMedExp, Université de Montpellier, INSERM, CNRS, Montpellier, France

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Denis Mariano-Goulart Département de Médecine Nucléaire, Hôpital Lapeyronie, Centre Hospitalier Régional Universitaire (CHU) Montpellier, Montpellier, France
PhyMedExp, Université de Montpellier, INSERM, CNRS, Montpellier, France

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Helena Huguet Unité de Recherche Clinique et Epidémiologie, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France

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Eric Renard Departement d’Endocrinologie, Diabète, Nutrition, Hôpital Lapeyronie, CHRU Montpellier, Montpellier, France
CIC INSERM 1411, Hôpital Gui de Chauliac, CHU Montpellier, Montpellier Cedex 5, France
Institut de Génomique Fonctionnelle, CNRS UMR 5203/INSERM U661/Université Montpellier, Montpellier, France

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Patrick Lefebvre Departement d’Endocrinologie, Diabète, Nutrition, Hôpital Lapeyronie, CHRU Montpellier, Montpellier, France

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Marie-Christine Picot Unité de Recherche Clinique et Epidémiologie, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France
CIC INSERM 1411, Hôpital Gui de Chauliac, CHU Montpellier, Montpellier Cedex 5, France

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Anne-Marie Dupuy Département de Biochimie, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France

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Jean-Paul Cristol PhyMedExp, Université de Montpellier, INSERM, CNRS, Montpellier, France
Département de Biochimie, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France

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Philippe Courtet Institut de Génomique Fonctionnelle, CNRS, INSERM Université Montpellier, Montpellier, France
Département d’Urgence et Post-Urgence Psychiatrique, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France

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Vincent Boudousq Département de Médecine Nucléaire, Hôpital Carémeau, CHU Nîmes, Nîmes, France

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Antoine Avignon Département Endocrinologie, Nutrition, Diabète, Equipe Nutrition, Diabète, CHU Montpellier, Montpellier, France

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Sébastien Guillaume Institut de Génomique Fonctionnelle, CNRS, INSERM Université Montpellier, Montpellier, France
Département d’Urgence et Post-Urgence Psychiatrique, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France

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Ariane Sultan PhyMedExp, Université de Montpellier, INSERM, CNRS, Montpellier, France
Département Endocrinologie, Nutrition, Diabète, Equipe Nutrition, Diabète, CHU Montpellier, Montpellier, France

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, calcium, bisphosphonate, selective oestrogen receptor modulator or teriparatide use. None used contraceptives. CON and patients with AN were age-matched (±6 months). Methods Anthropometric measurements Standing height was measured with a

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Yee-Ming M Cheung Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia
Department of Endocrinology, Austin Health, Melbourne, Australia
Division of Endocrinology, Diabetes and Metabolism, Northwell, Great Neck, New York, USA

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Rudolf Hoermann Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia

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Karen Van Department of Endocrinology, Austin Health, Melbourne, Australia

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Damian Wu Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia

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Jenny Healy Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia

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Bella Halim Department of Endocrinology, Austin Health, Melbourne, Australia

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Manjri Raval Department of Endocrinology, Austin Health, Melbourne, Australia

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Maria McGill Department of Radiology, Austin Health, Melbourne, Australia

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Ali Al-Fiadh Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia
Department of Cardiology, Austin Health, Melbourne Australia

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Michael Chao Olivia Newton-John Cancer Research and Wellness Centre, Austin Health, Melbourne, Australia

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Shane White Olivia Newton-John Cancer Research and Wellness Centre, Austin Health, Melbourne, Australia

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Belinda Yeo Olivia Newton-John Cancer Research and Wellness Centre, Austin Health, Melbourne, Australia
Olivia Newton-John Cancer Research Institute, Austin Health, Melbourne, Australia

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Jeffrey D Zajac Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia
Department of Endocrinology, Austin Health, Melbourne, Australia

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Mathis Grossmann Department of Medicine, The University of Melbourne, Austin Health, Melbourne, Australia
Department of Endocrinology, Austin Health, Melbourne, Australia

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, 13 , 14 ), with some suggesting an increase in CVD mortality in individuals undergoing AI treatment when compared to either tamoxifen, a selective oestrogen receptor modulator, or placebo ( 10 , 12 , 13 ). However, most studies were retrospective

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