Fig 2.

A 34-year-old man (patient 2) who underwent partial laminectomy and diskectomy 4 months before the MR imaging examination. Sagittal T2-weighted image (A) shows a paravertebral mass at the S1–2 level (arrow) with a high signal intensity in the center and a low signal intensity at the periphery. The axial T1-weighted image (B) with contrast enhancement shows bilateral posterior paravertebral masses with peripheral rim enhancement at the same location as in A. Initial radiologic differential diagnosis was abscess and gossypiboma. Small surgical gauzes were removed from the bilateral masses.