Osteoporosis predominantly affects postmenopausal women and older men. However, although far more rarely, it can also occur in younger individuals affected by certain conditions and disorders. 

Calcified Tissue International and Musculoskeletal Disorders has compiled a series of eight authoritative reviews by leading experts in the field, each with a focus on less common causes of bone loss. The reviews provide a comprehensive look at pregnancy-associated osteoporosis, HIV and bone health, early-onset osteoporosis due to genetic mutations, anorexia nervosa-related and bariatric surgery-related osteoporosis, disuse osteoporosis, the impact of Low Energy Availability on bone health in athletes, and bone health in transgender individuals. 

The journal editors, Professors René Rizzoli and Stuart Ralston, stated: 

“The authors of these excellent reviews have provided important insights and comprehensive information of value to all clinicians who treat patients experiencing these less common causes of osteoporosis. We believe readers will enjoy discovering these articles as much as we have.”

• Ralston, S.H., Rizzoli, R. Editorial: Unusual Causes of Osteoporosis.
  Calcif Tissue Int (2022). https://doi.org/10.1007/s00223-022-00974-0
   
• Hardcastle, S.A. Pregnancy and Lactation Associated Osteoporosis.
  Calcif Tissue Int (2021).https://doi.org/10.1007/s00223-021-00815-6 
   
• Mäkitie, O., Zillikens, M.C. Early-Onset Osteoporosis.
  Calcif Tissue Int (2021). https://doi.org/10.1007/s00223-021-00885-6 
   
• Hung, C., Muñoz, M. & Shibli-Rahhal, A. Anorexia Nervosa and Osteoporosis.
  Calcif Tissue Int (2021). https://doi.org/10.1007/s00223-021-00826-3
   
• Paccou, J., Caiazzo, R., Lespessailles, E. et al. Bariatric Surgery and Osteoporosis.
  Calcif Tissue Int (2021). https://doi.org/10.1007/s00223-020-00798-w
   
• Rolvien, T., Amling, M. Disuse Osteoporosis: Clinical and Mechanistic Insights.
  Calcif Tissue Int (2021). https://doi.org/10.1007/s00223-021-00836-1
   
• Popp, K.L., Cooke, L.M., Bouxsein, M.L. et al. Impact of Low Energy Availability on Skeletal Health in Physically Active Adults.
  Calcif Tissue Int (2022). https://doi.org/10.1007/s00223-022-00957-1
   
• Verroken, C., Collet, S., Lapauw, B. et al. Osteoporosis and Bone Health in Transgender Individuals.
  Calcif Tissue Int (2022). https://doi.org/10.1007/s00223-022-00972-2
   
• Biver, E. Osteoporosis and HIV Infection.
  Calcif Tissue Int (2022). https://doi.org/10.1007/s00223-022-00946-4   

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About Calcified Tissue International & Musculoskeletal Research
Calcified Tissue International & Musculoskeletal Research is a peer-reviewed journal which publishes original preclinical, translational and clinical research, and reviews concerning the structure and function of bone, and other musculoskeletal tissues in living organisms, as well as clinical studies of musculoskeletal disease. It includes studies of cell biology, molecular biology, intracellular signalling, and physiology, as well as research into the hormones, cytokines and other mediators that influence the musculoskeletal system. The journal also publishes clinical studies of relevance to bone disease, mineral metabolism, muscle function, and musculoskeletal interactions. https://www.springer.com/journal/223
Editors in Chief: Stuart Ralston and René Rizzoli; Musculoskeletal Research Section Editor: Roger Fielding.

About IOF
The International Osteoporosis Foundation (IOF) is the world's largest nongovernmental organization dedicated to the prevention, diagnosis and treatment of osteoporosis and related musculoskeletal diseases. IOF members, including committees of scientific researchers as well as more than 300 patient, medical and research organizations, work together to make fracture prevention and healthy mobility a worldwide heath care priority. https://www.osteoporosis.foundation  @iofbonehealth