Abstract
Several factors, such as immobilization, metabolic bone disease and immunosuppressive drugs, can compromise the quality of bone in children who have undergone solid organ transplantation. In contrast to adults, decreased bone mineral density has been reported in only a small proportion of pediatric transplant patients, and the relationship between low bone mineral density and fracture risk has not been established in children. Nevertheless, fractures, scoliosis, and joint and spinal degeneration are common in patients who received solid organ grafts as children. Avascular bone necrosis occurs infrequently in this patient population. Future studies should evaluate the effects of the underlying disease, transplantation and immunosuppression on the metabolism of bone and cartilage. On the basis of our own clinical experience and literature review, the growing spine of children who have received transplants should be continuously evaluated, and follow-up of bone mineral density is indicated. By contrast, routine MRI of the joints seems unnecessary.
Key Points
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Compared with the normal population, the risk of fractures after solid organ transplantation is much increased in childhood
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Scoliosis, vertebral fractures and back pain are common in pediatric transplant recipients
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Correction of spinal deformity has reasonable outcomes in pediatric transplant recipients; there are no data on brace treatment in this population
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The risk of avascular necrosis of joints is markedly reduced with newer immunosuppressive medications, and routine MRI of the hip joints seems unnecessary
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Study of bone metabolic disorders and fracture prevention using pharmacological agents in pediatric transplant recipients is urgently needed
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Acknowledgements
This study was financially supported by Helsinki University Central Hospital, the Päivikki and Sakari Sohlberg Foundation, the Foundation for Pediatric Research, the Paulo Foundation, and the Academy of Finland.
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Helenius, I., Jalanko, H., Remes, V. et al. Therapy Insight: orthopedic complications after solid organ transplantation in childhood. Nat Rev Nephrol 3, 96–105 (2007). https://doi.org/10.1038/ncpneph0384
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DOI: https://doi.org/10.1038/ncpneph0384