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Fig 3. An 86-year-old man (patient 5) who underwent laminectomy and diskectomy 5 years before the MR imaging examination. Sagittal T1-weighted image (A) shows a posterior paravertebral mass with an intermediate signal intensity at the L2–3 level. Axial and sagittal T1-weighted images with contrast enhancement (B and C) show a right posterior paravertebral mass with peripheral rim enhancement. Initial radiologic differential diagnosis was abscess and gossypiboma. The mass was proved to contain a small surgical gauze surrounded by a thick fibrous capsule.
