Fig. 2. Scan of the T2-weighted saggital section of the cervical spinal cord magnetic resonance imaging performed 25 months post–interscalene block in patient 2 showing one in-continuity C1–T1 intramedullary spinal cord lesion consisting of a central myelomalotic syrinx and a T2 intradural but extramedullary mass (during axial view the position of the mass was right anterolateral).