Fig. 4From: Surgical management of sacral meningeal cysts by obstructing the communicating holes with muscle graftPreoperative sagittal magnetic resonance image (a) shows a sacral meningeal cyst at S1–2 level, and transverse image (b) shows cystic lesion compressing the right S1 nerve root (white arrow); Taken 64 months after surgery, sagittal image (c) shows obliteration of the cyst, transverse image (d) shows decompressed right S1 nerve root (white arrow) and stable muscle graft (black arrow)Back to article page