Retained surgical sponge in differential diagnosis of paraspinal soft-tissue mass after posterior spinal surgery: Report of eight cases

Background: In the postoperative period of posterior spinal surgery, surgeons usually encounter a wide spectrum of complications, including retained surgical sponge, gossypiboma. Materials and Methods: Retrospective review of case records of eight patients diagnosed with gossypiboma with emphasis on computed tomography (CT) and magnetic resonance imaging (MRI) findings. Results: All the eight patients presented with low back pain and/or symptoms of infection, such as draining from the incision site, fever, and tenderness. The diagnosis was confirmed by the imaging findings on MRI with gadolinium enhancement. Conclusion: Retained paravertebral surgical sponges are seldom reported due to medicolegal implications. Awareness of this complication among neurosurgeons and radiologists is essential to avoid unnecessary morbidity.