Postoperative pain due to an occult spinal infection: A case report

Figure 2 Magnetic resonance imaging scan on day 4 postoperatively. A: T2-weighted axial magnetic resonance imaging (MRI) image showing a central decompression on L4-L5, with removal of the right-sided foraminal herniation. A fluid collection can be seen in both L4-L5 facet joints (yellow arrows); B and C: Right-sided and left-sided T2-weighted sagittal MRI images showing removal of the right-sided foraminal disc herniation; D: T2-weighted central sagittal MRI image showing a fluid collection (blue arrow), with small air collections (orange arrow) and a drain (purple arrow).