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Milou Cecilia Madsen Department of Internal Medicine and Center of Expertise on Gender Dysphoria, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands

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Martin den Heijer Department of Internal Medicine and Center of Expertise on Gender Dysphoria, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands

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Claudia Pees Walaeus Library, Leiden University Medical Center, Leiden, the Netherlands

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Nienke R Biermasz Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands

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Leontine E H Bakker Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, the Netherlands

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Testosterone therapy is the cornerstone in the care of men with hypogonadism and transgender males. Gel and intramuscular injections are most frequently used and are registered and included in the international guidelines. The specific preparation should be selected according to the patient’s preference, cost, availability, and formulation-specific properties. As the majority of men with hypogonadism and transgender males require lifelong treatment with testosterone, it is important to utilize a regimen that is effective, safe, inexpensive, and convenient to use with optimal mimicking of the physiological situation. This systematic review reviews current literature on differences between the three most used testosterone preparations in adult men with hypogonadism and transgender males. Although it appeared hardly any comparative studies have been carried out, there are indications of differences between the preparations, for example, on the stability of testosterone levels, hematocrit, bone mineral density, and patient satisfaction. However, there are no studies on the effects of testosterone replacement on endpoints such as cardiovascular disease in relation to hematocrit or osteoporotic fractures in relation to bone mineral density. The effect of testosterone therapy on health-related quality of life is strongly underexposed in the reviewed studies, while this is a highly relevant outcome measure from a patient perspective. In conclusion, current recommendations on testosterone treatment appear to be based on data primarily from non-randomized clinical studies and observational studies. The availability of reliable comparative data between the different preparations will assist in the process of individual decision-making to choose the most suitable formula.

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Francesca Marini Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
F.I.R.M.O. Italian Foundation for the Research on Bone Diseases, Florence, Italy

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Francesca Giusti Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Teresa Iantomasi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Federica Cioppi University Hospital of Florence, Azienda Ospedaliero Universitaria Careggi (AOUC), Florence, Italy

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Maria Luisa Brandi F.I.R.M.O. Italian Foundation for the Research on Bone Diseases, Florence, Italy

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Multiple endocrine neoplasia type 1 (MEN1) is a rare, inherited cancer syndrome characterized by the development of multiple endocrine and non-endocrine tumors. MEN1 patients show a reduction of bone mass and a higher prevalence of early onset osteoporosis, compared to healthy population of the same age, gender, and ethnicity. During the monitoring and follow-up of MEN1 patients, the attention of clinicians is primarily focused on the diagnosis and therapy of tumors, while the assessment of bone health and mineral metabolism is, in many cases, marginally considered. In this study, we retrospectively analyzed bone and mineral metabolism features in a series of MEN1 patients from the MEN1 Florentine database. Biochemical markers of bone and mineral metabolism and densitometric parameters of bone mass were retrieved from the database and were analyzed based on age ranges and genders of patients and presence/absence of the three main MEN1-related endocrine tumor types. Our evaluation confirmed that patients with a MEN1 diagnosis have a high prevalence of earlyonset osteopenia and osteoporosis, in association with levels of serum and urinary markers of bone turnover higher than the normal reference values, regardless of their different MEN1 tumors. Fifty percent of patients younger than 26 years manifested osteopenia and 8.3% had osteoporosis, in at least one of the measured bone sites. These data suggest the importance of including biochemical and instrumental monitoring of bone metabolism and bone mass in the routine medical evaluation and follow-up of MEN1 patients and MEN1 carriers as important clinical aspects in the management of the syndrome.

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Elinor Chelsom Vogt Department of Clinical Science, University of Bergen, Bergen, Norway
K.G. Jebsen Center for Autoimmune Disorders, University of Bergen, Bergen, Norway
Department of Medicine, Haukeland University Hospital, Bergen, Norway

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Francisco Gómez Real Department of Clinical Science, University of Bergen, Bergen, Norway
Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway

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Eystein Sverre Husebye Department of Clinical Science, University of Bergen, Bergen, Norway
K.G. Jebsen Center for Autoimmune Disorders, University of Bergen, Bergen, Norway
Department of Medicine, Haukeland University Hospital, Bergen, Norway

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Sigridur Björnsdottir Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden

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Bryndis Benediktsdottir Medical Faculty, University of Iceland, Reykjavik, Iceland
Department of Sleep, Landspitali University Hospital Reykjavík, Reykjavik, Iceland

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Randi Jacobsen Bertelsen Department of Clinical Science, University of Bergen, Bergen, Norway

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Pascal Demoly University Hospital of Montpellier, IDESP, Univ Montpellier-Inserm, Montpellier, France

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Karl Anders Franklin Department of Surgical and Perioperative Sciences, Surgery, Umeå University, Umeå, Sweden

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Leire Sainz de Aja Gallastegui Unit of Epidemiology and Public Health, Department of Health, Basque Government, Vitoria-Gasteiz, Spain

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Francisco Javier Callejas González Department of Respiratory Medicine, Albacete University Hospital, Albacete, Spain

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Joachim Heinrich Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
Allergy and Lung Health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia

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Mathias Holm Occupational and Environmental Medicine, School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Nils Oscar Jogi Department of Clinical Science, University of Bergen, Bergen, Norway

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Benedicte Leynaert Université Paris-Saclay, Inserm U1018, Center for Epidemiology and Population Health, Integrative Respiratory Epidemiology Team, Villejuif, France

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Eva Lindberg Department of Medical Sciences, Respiratory, Allergy and Sleep Medicine, Uppsala University, Uppsala, Sweden

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Andrei Malinovschi Department of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden

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Jesús Martínez-Moratalla Pneumology Service of the General University Hospital of Albacete, Albacete, Spain
Albacete Faculty of Medicine, Castilla-La Mancha University, Albacete, Spain

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Raúl Godoy Mayoral Department of Respiratory Medicine, Albacete University Hospital, Albacete, Spain

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Anna Oudin Section of Sustainable Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden

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Antonio Pereira-Vega Juan Ramón Jiménez University Hospital in Huelva, Huelva, Spain

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Chantal Raherison Semjen INSERM, EpiCene Team U1219, University of Bordeaux, Talence, France

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Vivi Schlünssen Department of Public Health, Environment, Work and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
The National Research Center for the Working Environment, Copenhagen, Denmark

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Kai Triebner Department of Clinical Science, University of Bergen, Bergen, Norway

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Marianne Øksnes Department of Clinical Science, University of Bergen, Bergen, Norway
K.G. Jebsen Center for Autoimmune Disorders, University of Bergen, Bergen, Norway
Department of Medicine, Haukeland University Hospital, Bergen, Norway

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Objective

To investigate markers of premature menopause (<40 years) and specifically the prevalence of autoimmune primary ovarian insufficiency (POI) in European women.

Design

Postmenopausal women were categorized according to age at menopause and self-reported reason for menopause in a cross-sectional analysis of 6870 women.

Methods

Variables associated with the timing of menopause and hormone measurements of 17β-estradiol and follicle-stimulating hormone were explored using multivariable logistic regression analysis. Specific immunoprecipitating assays of steroidogenic autoantibodies against 21-hydroxylase (21-OH), side-chain cleavage enzyme (anti-SCC) and 17alpha-hydroxylase (17 OH), as well as NACHT leucine-rich-repeat protein 5 were used to identify women with likely autoimmune POI.

Results

Premature menopause was identified in 2.8% of women, and these women had higher frequencies of nulliparity (37.4% vs 19.7%), obesity (28.7% vs 21.4%), osteoporosis (17.1% vs 11.6%), hormone replacement therapy (59.1% vs 36.9%) and never smokers (60.1% vs 50.9%) (P < 0.05), compared to women with menopause ≥40 years. Iatrogenic causes were found in 91 (47%) and non-ovarian causes in 27 (14%) women, while 77 (39%) women were classified as POI of unknown cause, resulting in a 1.1% prevalence of idiopathic POI. After adjustments nulliparity was the only variable significantly associated with POI (odds ratio 2.46; 95% CI 1.63–3.42). Based on the presence of autoantibodies against 21 OH and SCC, 4.5% of POI cases were of likely autoimmune origin.

Conclusion

Idiopathic POI affects 1.1% of all women and almost half of the women with premature menopause. Autoimmunity explains 4.5% of these cases judged by positive steroidogenic autoantibodies.

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Herjan J T Coelingh Bennink Pantarhei Oncology, Zeist, The Netherlands

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Jan Krijgh Pantarhei Oncology, Zeist, The Netherlands

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Jan F M Egberts Terminal 4 Communications, Hilversum, The Netherlands

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Maria Slootweg Independent Consultant, Zeist, The Netherlands

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Harm H E van Melick Department of Urology, St. Antonius Hospital, Nieuwegein, The Netherlands

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Erik P M Roos Department of Urology, Antonius Hospital, Sneek, The Netherlands

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Diederik M Somford Department of Urology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands

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Yvette Zimmerman Pantarhei Oncology, Zeist, The Netherlands

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Iman J Schultz Pantarhei Oncology, Zeist, The Netherlands

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Noel W Clarke The Christie and Salford Royal NHS Foundation Trusts, Manchester, UK

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R Jeroen A van Moorselaar Department of Urology, Amsterdam UMC, VU University, Amsterdam, The Netherlands

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Frans M J Debruyne Andros Clinics, Arnhem, The Netherlands

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The purpose of androgen deprivation therapy (ADT) in prostate cancer (PCa), using luteinizing hormone-releasing hormone agonists (LHRHa) or gonadotrophin-releasing hormone antagonists, is to suppress the levels of testosterone. Since testosterone is the precursor of estradiol (E2), one of the major undesired effects of ADT is the concomitant loss of E2, causing among others an increased bone turnover and bone loss and an increased risk of osteoporosis and fractures. Therefore, the guidelines for ADT indicate to combine ADT routinely with bone-sparing agents such as bisphosphonates, denosumab or selective estrogen receptor modulators. However, these compounds may have side effects and some require inconvenient parenteral administration. Co-treatment with estrogens is an alternative approach to prevent bone loss and at the same time, to avoid other side effects caused by the loss of estrogens, which is the topic explored in the present narrative review. Estrogens investigated in PCa patients include parenteral or transdermal E2, diethylstilbestrol (DES), and ethinylestradiol (EE) as monotherapy, or high-dose estetrol (HDE4) combined with ADT. Cardiovascular adverse events have been reported with parenteral E2, DES and EE. Encouraging effects on bone parameters have been obtained with transdermal E2 (tE2) and HDE4, in the tE2 development program (PATCH study), and in the LHRHa/HDE4 co-treatment study (PCombi), respectively. Confirmation of the beneficial effects of estrogen therapy with tE2 or HDE4 on bone health in patients with advanced PCa is needed, with special emphasis on bone mass and fracture rate.

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Zhiyan Yu Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Yueyue Wu Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Rui Zhang Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Yue Li Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Shufei Zang Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Jun Liu Department of Endocrinology, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China

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Background

This study aimed to investigate the association of non-alcoholic fatty liver disease (NAFLD) and liver fibrosis with osteoporosis in postmenopausal women and men over 50 years of age with type 2 diabetes (T2DM).

Methods

In this study, 1243 patients with T2DM (T2DM with coexistent NAFLD, n  = 760; T2DM with no NAFLD, n  = 483) were analysed. Non-invasive markers, NAFLD fibrosis score (NFS) and fibrosis index based on four factors (FIB-4), were applied to evaluate NAFLD fibrosis risk.

Results

There was no significant difference in bone mineral density (BMD) between the NAFLD group and the non-NAFLD group or between males and females after adjusting for age, BMI and gender. In postmenopausal women, there was an increased risk of osteoporosis (odds ratio (OR): 4.41, 95% CI: 1.04–18.70, P = 0.039) in the FIB-4 high risk group compared to the low risk group. Similarly, in women with high risk NFS, there was an increased risk of osteoporosis (OR: 5.98, 95% CI: 1.40–25.60, P = 0.043) compared to the low risk group. Among men over 50 years old, there was no significant difference in bone mineral density between the NAFLD group and the non-NAFLD group and no significant difference between bone mineral density and incidence of osteopenia or osteoporosis among those with different NAFLD fibrosis risk.

Conclusion

There was a significant association of high risk for NAFLD liver fibrosis with osteoporosis in postmenopausal diabetic women but not men. In clinical practice, gender-specific evaluation of osteoporosis is needed in patients with T2DM and coexistent NAFLD.

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Souad Daamouch Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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Sylvia Thiele Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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Lorenz Hofbauer Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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Martina Rauner Department of Medicine III and Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany

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The link between obesity and low bone strength has become a significant medical concern. The canonical Wnt signaling pathway is a key regulator of mesenchymal stem cell differentiation into either osteoblasts or adipocytes with active Wnt signaling promoting osteoblastogenesis. Our previous research indicated that Dickkopf-1 (Dkk1), a Wnt inhibitor, is upregulated in bone tissue in obesity and that osteoblast-derived Dkk1 drives obesity-induced bone loss. However, Dkk1 is also produced by adipocytes, but the impact of adipogenic Dkk1 on bone remodeling and its role in obesity-induced bone loss remain unclear. Thus, in this study, we investigated the influence of adipogenic Dkk1 on bone homeostasis and obesity-induced bone loss in mice. To that end, deletion of Dkk1 in adipocytes was induced by tamoxifen administration into 8-week-old male Dkk1fl/fl;AdipoQcreERT2 mice. Bone and fat mass were analyzed at 12 and 20 weeks of age. Obesity was induced in 8-week-old male Dkk1fl/fl;AdipoQcre mice with a high-fat diet (HFD) rich in saturated fats for 12 weeks. We observed that 12-week-old male mice without adipogenic Dkk1 had a significant increase in trabecular bone volume in the vertebrae and femoral bones. While histological and serological bone formation markers were not different, the number of osteoclasts and adipocytes was decreased in the vertebral bones of Dkk1fl/fl;AdipoQcre-positive mice. Despite the increased bone mass in 12-week-old male mice, at 20 weeks of age, there was no difference in the bone volume between the controls and Dkk1fl/fl;AdipoQcre-positive mice. Also, Dkk1fl/fl;AdipoQcre-positive mice were not protected from HFD-induced bone loss. Even though mRNA expression levels of Sost, another important Wnt inhibitor, in bone from Dkk1-deficient mice fed with HFD were decreased compared to Dkk1-sufficient mice on an HFD, this did not prevent the HFD-induced suppression of bone formation. In conclusion, adipogenic Dkk1 may play a transient role in bone mass regulation during adolescence, but it does not contribute to bone homeostasis or obesity-induced bone loss later in life.

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Jiaxin Zhang Department of Traditional Chinese Medicine (TCM) Orthopedics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China

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Jinlan Jiang Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang, China

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Yao Qin School of Public Health, Hangzhou Medical College, Hangzhou, Zhejiang, China

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Yihui Zhang Department of Traditional Chinese Medicine (TCM) Orthopedics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China

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Yungang Wu Department of Traditional Chinese Medicine (TCM) Orthopedics, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China

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Huadong Xu School of Public Health, Hangzhou Medical College, Hangzhou, Zhejiang, China

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Purpose

This study aims to investigate the associations of the systemic immune-inflammation index (SII) with bone mineral density (BMD) and osteoporosis in adult females from a nationally representative sample.

Methods

A cross-sectional study was performed among 4092 females aged ≥20 years from the National Health and Nutrition Examination Survey 2007–2010. Linear and logistic regressions were applied to explore the relationships of SII with BMD and the risk of osteoporosis, respectively.

Results

Linear regression analyses found that a doubling of SII levels was significantly correlated with a 1.39% (95% CI: 0.57%, 2.20%) decrease in total femur BMD, a 1.16% (95% CI: 0.31%, 2.00%) decrease in femur neck BMD, a 1.73% (95% CI: 0.78%, 2.66%) decrease in trochanter BMD, and a 1.35% (95% CI: 0.50%, 2.20%) decrease in intertrochanteric BMD among postmenopausal women, after adjusting for covariates. Logistic regression analyses showed that compared with postmenopausal women in the lowest SII quartile, those in the highest quartile had higher risks of osteoporosis in the total femur (odds ratio (OR) = 1.70, 95% CI: 1.04, 2.76), trochanter (OR = 1.86, 95% CI: 1.07, 3.38), intertrochanter (OR = 2.01, 95% CI: 1.05, 4.04) as well as overall osteoporosis (OR = 1.57, 95% CI: 1.04, 2.37). In contrast, there was no significant association between SII and BMD in premenopausal women.

Conclusions

SII levels were negatively associated with BMD levels in postmenopausal women but not in premenopausal women. Elevated SII levels could be a potential risk factor for osteoporosis in postmenopausal women.

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Demi T.c. de Winter D de Winter, Princess Máxima Center for Pediatric Oncology, Prinses Maxima Centrum voor Kinderoncologie BV, Utrecht, Netherlands

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Sebastian J.c.m.m. Neggers S Neggers, Department of Internal Medicine, section Endocrinology, Erasmus MC University Medical Center Rotterdam, Rotterdam, Netherlands

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Mm van den Heuvel-Eibrink M van den Heuvel-Eibrink, Princess Máxima Center for Pediatric Oncology, Prinses Maxima Centrum voor Kinderoncologie BV, Utrecht, Netherlands

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Jenneke E. van Atteveld J van Atteveld, Princess Máxima Center for Pediatric Oncology, Prinses Maxima Centrum voor Kinderoncologie BV, Utrecht, Netherlands

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Childhood cancer survivors are at increased risk of developing (long-term) skeletal adverse effects, such as osteonecrosis, impaired bone mineral density, and fractures. This paper provides an overview of the current understanding of bone health in these survivors, examining whether it represents a significant concern. It focuses on the challenges of assessing and managing bone health in childhood cancer survivors, highlighting diagnostic pitfalls, methods for accurately identifying those at high risk, and suggested strategies for surveillance and management of osteonecrosis and impaired bone mineral density. The need for improved surveillance strategies, particularly for high-risk survivors, alongside potential prevention and management options, including pharmacological and lifestyle interventions, is emphasised. Given the lack of consensus on optimal prevention and treatment strategies, the paper emphasises the need for further research to optimise care and improve long-term outcomes for childhood cancer survivors with bone health impairments.

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