Can these lesions extend beyond the dura and through the intervertebral foramina? List eight differential diagnoses of an extradural lesion. Multiple schwannomas can occur with what syndrome? What are the signal characteristics of schwannomas on MRI? What is extension of the lesion through the foramen called? Book traversal links for Extradural tumors ‹ Which diagnosis does mass effect in the spinal canal suggest? Up Can these lesions extend beyond the dura and through the intervertebral foramina? ›