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Echinococcosis of the rib with epidural extension: a rare cause of paraplegia

Department of Radiology, K.E.M Hospital, Acharya Dhonde Marg, Parel, Mumbai-400012 India

View larger version (123K): [in a new window]   Figure 1. Plain radiograph of the dorsal spine shows an expansile lytic lesion without cortical breakthrough along the posterior aspect of the right 9th rib.

View larger version (138K): [in a new window]   Figure 2. Axial contrast enhanced CT scan of thorax shows a multiloculated, sharply defined, cystic lesion along the posterior aspect of the right 9th rib with epidural extension.

View larger version (99K): [in a new window]   Figure 3. Axial bone window image at the same level showing expansile lytic lesion of the rib with destruction of adjacent transverse process. There is no calcification or sclerosis.

View larger version (103K): [in a new window]   Figure 4. Axial T2 weighted MR image showing homogeneous high intensity multicystic lesion along the posterior aspect of the right 9th rib with epidural extension and impingement of the cord.

View larger version (102K): [in a new window]   Figure 5. Sagittal T2 weighted MR sequence demonstrating the extradural involvement with compression of the thecal sac.