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FIGURE 14. New-onset back pain in breast cancer patient with previous L4–L5 fusion. (A–C) Sagittal slices of T2-weighted MRI of lumbar spine without evidence of metastases. L4–L5 posterior fusion and facets are unremarkable on MRI. (C, D, and E) MRI, 18F, and MRI fusion showing, on transaxial slice, marked uptake in left L3–L4 facet from progressive arthritis (arrows). Combined imaging excluded malignancy. Directed facet block could be both diagnostic and therapeutic.
