PMC7552353_01
PTH, calcium, and phosphorus levels during the preceding 12 months.
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Figure1
The data for the 12 months from June 2016 to May 2017 are presented in Figure 1. Likewise, chronic hyperphosphatemia improved from 8.0 to 6.2 mg/dL from January to February 2017 with subsequent normalization (Figure 1).
CT of the chest: Lytic bone lesions in ribs with soft tissue masses.
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Figure2
Subsequent CT chest with intravenous contrast showed multiple lytic bone lesions involving several ribs and the spine (Figure 2).
MRI of thoracic spine: Severe spinal canal stenosis and cord edema at T3, moderate stenosis at T12.
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Figure3
Subsequent MRI imaging confirmed expansile masses compatible with brown tumors at T3 with severe spinal canal stenosis and underlying cord edema, and T12 with moderate spinal canal stenosis (Figure 3). 
Biopsy of resected bone and stromal mass at T3 consistent with brown tumor.
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Figure4
The bone showed remodeling with increased osteoid rimming (Figure 4). 