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Chronic cystic lesion of the sacrum: characterisation with diffusion-weighted MR imaging

      Sacral bone remodelling with abnormal dilatation of intervertebral foramina is usually associated with Tarlov cysts but can be caused by slow-growth lesions, which may also present cerebrospinal fluid (CSF)-like signal or density. We describe three patients with a similar history of lower back pain presenting CSF-like density/signal lesions with extensive sacral bone remodelling who were affected by a Tarlov cyst, an epidermoid cyst, and a giant neurofibroma, respectively.
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