Epidural gas-containing pseudocyst leading to lumbar radiculopathy: A case report

Figure 2 Digital pictures taken during percutaneous endoscopic decompression. A: The blister-like membranous structure of the gas-containing cyst located in the posterolateral region of the spinal canal; B: A 20 G needle was used to puncture the gas-containing cyst before gas extraction; C: The gas was extracted into the syringe, and the scale shows that almost 1 mL of gas was extracted; D: Pathological examination showed that the picked gas-containing pseudocyst tissue is fibrous connective tissue (× 100); E: The wall of the gas-containing pseudocyst was fibrous connective tissue and lined with flat cells (× 200).