PMC8026209_01
Pre- (top) and postoperative (bottom) lumbar spine T2-weighted magnetic resonance imaging on sagittal view (A) and axial view at L2/3 (B), L3/4 (C), and L4/5 (D). Yellow arrows suggest a subdural hematoma.
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Lumbar magnetic resonance imaging (MRI) showed LSS at L2/3, 3/4, and 4/5 (Fig. 1). Postoperative lumbar MRI showed no disk herniation or spinal epidural hematoma, but the presence of mild PSSH (Fig. 1).
Postoperative Numerical Rating Scale scores of pain. The horizontal axis indicates postoperative day (POD).
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The patient's condition, including the Numerical Rating Scale score of right leg pain, was monitored, but severe pain persisted (Fig. 2). His symptoms dramatically improved, and his Numerical Rating Scale score of pain was 2 at discharge (Fig. 2).
Intraoperative findings of the second surgery. Pre- (A), intra- (B), and post- (C) incision of the dura mater.
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Intraoperative findings showed no disk herniation, epidural hematoma, or nerve incarceration, but a subdural hematoma was observed (Fig. 3A); however, it did not show strong compression to the dura mater or nerve roots. An incision of the dura mater released yellow serous fluid (Fig. 3B). The arachnoid was intact (Fig. 3C).