Overview
Fibrous dysplasia is a rare skeletal disorder characterized by abnormal bone development due to mutations in the GNAS1 gene, leading to fibrous tissue replacement within bones and often causing pain, deformities, and increased fracture risk 13.Diagnosis
Clinical presentation includes bone pain, deformities, and potential fractures 13.
Imaging studies (X-ray, MRI, CT) are crucial for identifying characteristic lesions and assessing bone involvement 12.
Biopsy may be necessary for definitive diagnosis, showing fibrotic tissue with irregular trabeculae 4.Management
First-line treatments: Pain management with analgesics; physical therapy to maintain function 1.
Adjunctive treatments:
- Bisphosphonates: High-dose oral alendronate (40 mg daily) shown effective for reducing pain in skull involvement 3.
- Surgical interventions: Intramedullary nailing can be effective as salvage therapy for lower limb deformities and fractures in polyostotic fibrous dysplasia 2.Special Populations
Pediatrics: Limited specific data; management focuses on pain control and monitoring growth and development 1.
Comorbidities: No specific guidance provided; individualized treatment plans considering overall health status are recommended 123.Key Recommendations
Regularly monitor pain levels and quality of life in fibrous dysplasia patients, as pain can fluctuate over time despite stability in severe cases (Evidence: Moderate 1).
Consider high-dose oral bisphosphonates for symptomatic relief in patients with skull involvement who are not candidates for surgery (Evidence: Moderate 3).
Intramedullary nailing can be a viable salvage surgical option for patients with polyostotic fibrous dysplasia experiencing significant deformities or fractures (Evidence: Weak 2).References
1 Bulaicon OO, Hagelstein-Rotman M, Meier ME, van der Geest I, van Haalen FM, Hogewoning-Rewijk J et al.. The Natural Course of Pain in Fibrous Dysplasia/McCune Albright Syndrome: A Prospective Follow Up Study. Calcified tissue international 2025. link
2 Ippolito E, Farsetti P, Caterini R, Gorgolini G, Caterini A, De Maio F. Lower-limb intramedullary nailing in patients with polyostotic fibrous dysplasia who had a previous unsuccessful treatment. A report of 48 cases. Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology 2023. link
3 Chao K, Katznelson L. Use of high-dose oral bisphosphonate therapy for symptomatic fibrous dysplasia of the skull. Journal of neurosurgery 2008. link
4 Samant HC, Agarwal MK, Gupta OP, Khanna S. Fibrous dysplasia of the mastoid. The Journal of laryngology and otology 1980. link