case_images: PMC10276332_01
case_images: PMC10276332_02
case_images: A) a heterogenous contrast-enhancing mass (indicated within red circle) from the L5 nerve root extending to retroperitoneal space and eroding some of the L5 vertebral body; B) the mass (indicated within red circle) originated from L5 nerve root extending to retroperitoneal space with craniocaudal length >2 vertebral bodies
case_images: PAMJ-44-140-g001.jpg
case_images: PMC10276332_02_PAMJ-44-140-g001.jpg
case_images: F1
case_images: The MRI with contrast showed the presence of an extradural soft tissue tumor, measuring 8.6x7.4x9.7 cm, compressing the L5-S1 intervertebral foramen and extending into the retroperitoneal space, as well as compressing the right iliac artery, as shown in Figure 1.
case_images: A) preoperative photo showing incision marking and preparation for retroperitoneal approach; B) intraoperative photo showing a white-greyish mass with well-defined edges was found in retroperitoneal space (indicated by a white arrow)
case_images: PAMJ-44-140-g002.jpg
case_images: PMC10276332_02_PAMJ-44-140-g002.jpg
case_images: F2
case_images: The L5 vertebral body and disc space were identified with C-arm fluoroscopy and then marked on the patient's skin, as shown in Figure 2A. After identifying the peritoneum, blunt dissection was performed down to the retroperitoneal space using a sponge stick, as shown in Figure 2B.
case_images: A) microscopic examination showing hypercellular (antoni A) and hypocellular area (Antoni B) (haematoxylin and eosin stain, original magnification x100); B) microscopic examination showing cells are narrow and elongated, nuclear palisading around the fibrillary process (verocay bodies) (haematoxylin and eosin stain, original magnification x400)
case_images: PAMJ-44-140-g003.jpg
case_images: PMC10276332_02_PAMJ-44-140-g003.jpg
case_images: F3
case_images: The results followed the characteristics of a benign schwannoma tumor, as depicted in Figure 3.