IMAGING OF EXTRASPINAL TUBERCULOUS OSTEOMYELITIS
Abstract
Purpose: To describe the radiographic patterns of tuberculous osteomyelitis whereas extraspinal location was uncommon.
Materials and methods: Five of twenty-two patients with pathological diagnosis of skeletal tuberculosis who had extraspinal lesions were retrospectively reviewed. All imaging techniques including routine plain radiographs, CT scan or MR imaging were evaluated.
Results: Four patients had solitary lesion with different sites in phalanx, metacarpal bone, capitulum and ilium respectively. The other one had two lesions in bony pelvis. All had similar patterns of osteolysis with irregular borders and cortical violations. None had sclerosis or periosteal reaction. CT and MRI exhibited one sequestrum and one abscess extension into soft tissue.
Conclusion: On the basis of radiologic appearance, the extraspinal tuberculous osteomyelitis is difficult to be differentiated from tumor and tumor-like conditions. CT or MRI can provide more information of sequestrum and abscess that is helpful for diagnosis and evaluation of extent of the lesion.
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