Characteristics of calcaneal bone infarction: an MR imaging investigation
| Autor: | Alex Norman, Denise Leslie, Ramin Abrahim-zadeh, Robert M. Klein |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Adult
medicine.medical_specialty Bone disease Bone Infarction Sensitivity and Specificity Radiologic sign Biopsy medicine Humans Radiology Nuclear Medicine and imaging Retrospective Studies medicine.diagnostic_test business.industry Vascular disease Osteonecrosis Arteries Middle Aged medicine.disease Magnetic Resonance Imaging Calcaneus medicine.anatomical_structure Infarction Orthopedic surgery Female Radiology Ankle business |
| Zdroj: | Skeletal radiology. 27(6) |
| ISSN: | 0364-2348 |
| Popis: | Objective. Bone infarction (BI) of the calcaneus is an uncommon entity which has received little mention in the recent literature. In this paper, we review the MR images of six calcanei with BI, which demonstrate a pattern of presentation that may explain the etiology of BI at this unusual location. Design. A retrospective review was performed of the transcribed reports of the foot or ankle MR examinations at our institution. MR images of examinations with any marrow signal abnormality were reviewed for presence of BI and its distribution. Patients. Based on MRI criteria, four patients had calcaneal BI (none biopsy proven); they ranged in age from 37 to 51 years old. Two patients were diagnosed with systemic lupus erythematosus, one with fibrositis, and another with polymyositis. All were treated with corticosteroids. Results. Six calcanei (in four patients) contained a region of calcaneal BI. In five of the six, the lesions were entirely or predominantly located in the posterior half of the calcaneus. Conclusion. Two theories are proposed which may explain why BI predominantly occurs in the posterior half of the calcaneus. First, the convergence of the recurrent intraosseous calcaneal vessels may occasionally produce the equivalent of a single dominant vessel that is more prone to vascular accidents. Secondly, the region between the recurrent and the epiphyseal vessels may act as a watershed zone, increasing its susceptibility to ischemia. |
| Databáze: | OpenAIRE |
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