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A 79-year-old man visited our clinic complaining of lower back and left leg radiating pain that began 1 month prior to his presentation. He underwent surgery for lumbar disc herniation 20 years ago at another hospital. Magnetic resonance imaging revealed left-sided foraminal stenosis at L4-5. In addition, a paraspinal mass occupying the L4 spinous process and left lamina was observed. We subsequently performed an L4-5 decompression and fusion. During the operation, retained surgical gauze with granulation tissue was found. The term gossypiboma is used to define a mass lesion consisting of retained surgical gauzes and an adjacent foreign body reaction. Gossypibomas are uncommon in the paraspinal area and are mostly asymptomatic in chronic cases. Because there are no specific clinical or radiological signs, they can be confused with other tumorous conditions. Gossypibomas should be included in the differential diagnosis of paraspinal soft-tissue masses detected in patients with a history of prior spinal surgery.
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A 48-year-old woman presented with acute voiding difficulty, numbness and weakness of both lower extremities. Magnetic resonance imaging (MRI) showed an intramedullary hemorrhagic mass that extended from T9 to T10. T8-T10 laminotomy and surgical removal of the hemorrhagic mass was performed. The pathological diagnosis was hematoma. Her neurological status remained the same after the operation. At 5 days post-operation, the patient suddenly became paraplegic, and MRI that was immediately performed revealed a recurrent intramedullary hemorrhage. Emergent surgical evacuation was performed. Again, histological examination showed only hematoma, without any evidence of abnormal vessels or a tumor. A postoperative MRI revealed no abnormal lesions other than those resulting from postoperative changes. At a 9-month follow up, the patient could walk a short distance with the aid of a walker. Because spontaneous intramedullary hemorrhage with unknown etiology is very rare, it is essential to perform a meticulous inspection of the hemorrhagic site to find the underlying cause. Repeated hemorrhage can occur; therefore, close observation of patients after surgery is important in cases without an apparent etiology. Urgent surgical evacuation is important to improve outcomes in these cases.
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