Fig. 6.

A – 39-year-old man, MRI-T2WI sagittal section: equisignal soft tissue mass located at the posterior part of the vertebra in T12– L2. The mass grew forwards, invading the vertebral body, and backwards, invading the paravertebral muscles; the corresponding spinal canal was replaced by soft tissue mass (indicated by arrow); B – the same patient, cross-section: peripheral mass encysted the left appendix and the adjacent vertebral body of T12; the mass invaded inwards into the spinal canal, leading to compression of the spinal cord, and was poorly defined from the paraspinal muscles (indicated by arrow); C – cross-section: mass centered at the spinous process of L2; it was well defined and grew forwards into the vertebral canal with a narrowed spinal cavity (indicated by arrow); D – cross-section: a relatively low signal mass was observed in the sacrum and coccyx, which was centered at the right ilium; another abnormal signal was observed inside the ilium with a poorly defined mass (indicated by arrow)