Article Figures & Data
Figures
- Fig 1.
Thoracic spine CT scan shows an epidural mass compressing the spinal cord without bony destruction.
- Fig 2.
MR imaging demonstrates the expansile epidural mass from T1 to T7, showing heterogeneous iso- and hyperintensity on the sagittal T2-weighted image (A) and homogeneous isointensity on the T1-weighted image (B). The postcontrast sagittal (C) and axial (D) images reveal a homogeneous enhancing lesion with cord compression. There is no abnormality in the adjacent bone.
- Fig 3.
Microscopically, there is a polymorphic infiltrate composed of plump myofibroblasts (arrows) and lymphoplasma cells in loose fibromyxoid stroma, suggesting inflammatory myofibroblastic tumor (hematoxylin and eosin, original magnification ×100).
- Fig 4.
A, Abundant inflammatory cells such as plasma cells (arrow) in rich vascular stroma are seen in some areas (hematoxylin and eosin, original magnification ×200.)
B, Paucicellular area shows platelike collagen resembling scar tissue (hematoxylin and eosin, original magnification ×200).
Tables
Characteristics of cases of inflammatory pseudotumors reported in the literature that originated in the spinal canal
Source Age (y)/Sex Location Relation with Meninges Bony Destruction Signal Intensity on MR Images Compared with Spinal Cord T1-weighted T2-weighted Contrast-enhanced Roberts et al, 1997 (1) 58/F T9–T11 Epidural Yes Iso Hypo NR Aizawa et al, 2002 (3) 46/M C3–C7 Intramedullary No Iso Hypo Well Jeon et al, 2005 (4) 60/F L Etramedullary intradural NR NR NR Well Hsieh and Lin, 1995 (5) 37/M T5, T12–L1 Extramedullary intradural No Low NR NR Eimoto et al, 1978 (6) 37/M C4–C5 Extramedullary intradural No NR NR NR Gilliard et al, 2000 (7) 45/M C3–T2 Epidural Yes Iso NR Well Hsiang et al, 1994 (8) 57/M T12–T13 Intra- and extradural Yes Low NR Well Roberts et al, 2001 (9) 39/F T5–T6 Epidural No Iso Hypo NR Lee et al, 1998 (10) 3/F C2–T10 Intramedullary No NR NR Well Kilinc et al, 2002 (11) 34/M T9–T12 Intramedullary No Low Hyper Well Despeyroux-Ewers et al, 2003 (12) 22/F T9 Extramedullary intradural No Iso Hypo Well Note.—Iso indicates isointensity; Hypo, hypointensity; NR, not reported.
