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Bone Scintigraphy in the Detection of Chronic Recurrent Multifocal Osteomyelitis

Departments of Medical Imaging and Pathology, DuPont Hospital for Children, Wilmington, Delaware

Correspondence: For correspondence or reprints contact: Genald A. Mandell, MD, Department of Medical Imaging, DuPont Hospital for Children, 1600 Rockland Road, Wilmington, DE19899.

ABSTRACT

In this study, we describe the importance of the whole-body bone scan in diagnosing the multifocality of chronic recurrent multifocal osteomyelitis (CRMO) and in distinguishing it from unifocal acute hematogenous osteomyelitis. Materials: The medical records and two-phase, whole-body bone scans of 14 patients (mean age 10.5 yr)with the diagnosis of CRMO, were retrospectively reviewed. The diagnosis of CRMO was based on bone biopsy in 9 patients and clinical course/laboratory findings in 5. Bone scans were evaluated for geographic and anatomic locations of their lesions. Correlative radiographs of areas of abnormal uptake were performed to assess the radiographic appearance of the lesions. Results: The presentation of the disease was localized to one painful, tender and swollen periarticular site 86%of the time. The number of lesions detected by bone scan varied from 1–18 (mean 6). Most lesions were metaphyseal, proximal or distal tibial lesions. Puraly sclerotic or mixed (sclerosis and lysis)lesions were found on radiographs. Bilateral lesions were seen in 64%of patients. Biopsies were negative for organisms in all patients and exhibited subacute or chronic histologic changes in most instances. Complicalions of chronic hyperemia included marked overgrowth (5), diffuse demineralization (1), angular deformity (1) and length discrepancy (1). Conclusion:The identification of the multifocal configuration of the disease process by two-phase (soft-tissue and delayed) whole-body bone scintigraphy results in appropriate diagnosis and therapy of CRMO. Additional sites for possible bone biopsy become apparent for exclusion of other diagnoses. Supportive (nonsteroidal, anti-inflammatory medication) instead of antimicrobial therapy can be initiated with significant cost savings.

Key Words: angular deformity • bone scan • cost savings • chronic recurrent multifocal osteomyelitis • pinhole • SPECT

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