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| Diffuse idiopathic skeletal hyperostosis | |
|---|---|
| Name | Diffuse idiopathic skeletal hyperostosis |
| Field | Rheumatology, Orthopedics |
| Synonyms | Forestier disease |
| Onset | Middle to older age |
| Causes | Unknown |
| Diagnosis | Radiography, CT, MRI |
| Treatment | Conservative, surgical |
Diffuse idiopathic skeletal hyperostosis is a systemic enthesopathic condition characterized by calcification and ossification of ligaments and entheses, predominantly along the anterolateral spine. It commonly presents in older adults and can be incidentally identified on imaging performed for unrelated complaints. The disorder intersects clinical practice across Mayo Clinic, Johns Hopkins Hospital, Massachusetts General Hospital, Cleveland Clinic, and international centers such as Karolinska Institutet and Royal Melbourne Hospital where spine disease and metabolic bone disease are managed.
Patients frequently present with axial stiffness and reduced spinal mobility, especially in the thoracic and cervical regions, noted in clinics such as Mount Sinai Hospital and Guy's Hospital. Many cases are asymptomatic and discovered on radiographs taken for trauma at institutions like Royal London Hospital or during screening in cohorts studied by Framingham Heart Study investigators. Symptomatic individuals may experience dysphagia, hoarseness, or airway compromise when anterior cervical osteophytes impinge on the pharynx or larynx, prompting multidisciplinary referrals to centers including Mayo Clinic and Stanford Health Care. Neurological deficits from spinal cord compression are uncommon but have been reported in case series from Tokyo Medical University and Charité – Universitätsmedizin Berlin.
The etiology remains idiopathic but is associated with metabolic and demographic factors documented in epidemiological studies by World Health Organization collaborators and longitudinal cohorts such as Rotterdam Study and NHANES. Risk increases with age and male sex, mirroring patterns seen in registries at University of Oxford and University of Toronto. Associations include obesity, type 2 diabetes mellitus, and hyperinsulinemia, which have been explored by researchers at Harvard Medical School and University of California, San Francisco. Genetic predisposition and links to ossification disorders have been investigated in genetic studies at Broad Institute and Wellcome Trust Sanger Institute.
Pathologic mechanisms involve exuberant osteoproliferation at entheses with endochondral ossification, processes studied in basic science labs at National Institutes of Health and Max Planck Institute for Biology. Altered signaling in bone morphogenetic protein pathways and transforming growth factor beta cascades has been proposed in translational research from University of Cambridge and University of Pennsylvania. Vascular and metabolic milieu contributions, including altered insulin-like growth factor signaling, were reported in collaborative studies involving Imperial College London and University of Sydney.
Diagnosis is primarily radiographic, relying on criteria established in consensus statements produced by societies such as the European League Against Rheumatism and the American College of Rheumatology. Typical imaging features—flowing ossification along at least four contiguous vertebrae with preserved disc height—are identified on radiographs and cross-sectional imaging performed at centers like Mayo Clinic and Johns Hopkins Hospital. CT and MRI, available at Massachusetts General Hospital and Royal Marsden Hospital, help assess complications and exclude alternative causes. Laboratory studies are often noncontributory but may involve metabolic panels ordered in outpatient clinics of Cleveland Clinic and Karolinska University Hospital.
Conditions to exclude include axial spondyloarthritis evaluated by rheumatology services at Cedars-Sinai Medical Center and diffuse idiopathic forms of ossification such as ossification of the posterior longitudinal ligament described in surgical series from Seoul National University Hospital. Degenerative cervical spondylosis, contagious osteomyelitis seen in reports from Centers for Disease Control and Prevention, and metastatic bone disease treated at MD Anderson Cancer Center must be considered. Enthesopathy due to seronegative arthropathies is distinguished in clinics like Royal National Hospital for Rheumatic Diseases.
Conservative management includes analgesia, nonsteroidal anti-inflammatory drugs, physical therapy programs run by rehabilitation services at Shepherd Center and Mayo Clinic, and weight management guided by specialists at Johns Hopkins Hospital. For severe dysphagia or airway compromise, surgical anterior cervical osteophytectomy is performed in tertiary centers such as Massachusetts General Hospital and University College Hospital. Multidisciplinary care pathways involving otolaryngology at Guy's and St Thomas' NHS Foundation Trust and spine surgery teams at Hospital for Special Surgery are often required. Disease-modifying pharmacologic therapies remain investigational in trials coordinated by institutions like National Institutes of Health and European Medicines Agency-affiliated networks.
Prognosis is generally favorable for asymptomatic individuals, with slow progression documented in longitudinal cohorts like the Framingham Heart Study and the Rotterdam Study. Complications include chronic pain, reduced mobility, dysphagia, aspiration risk managed by teams at St Thomas' Hospital, and rare neurologic compromise necessitating decompressive surgery at specialized centers such as Toronto Western Hospital. Comorbid metabolic disease, including diabetes managed at Mount Sinai Hospital and cardiovascular risk profiles assessed by American Heart Association, influences overall morbidity and long-term outcomes.
Category:Rheumatology