Table 2:
Lesion characteristics on CT and MR imaging
| Case | Size (mm) | US | CT Attenuationa without Contrast | CT Attenuationa with Contrast | Bony Erosion | Relative Signal Intensity on T1b | Relative Signal Intensity on T2b | Enhancement Postgadolinium | ADC (×10−3 mm2/s) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | NA | NA | Iso | – | NA | NA | NA | NA |
| 2 | 5 | NA | NA | Iso | – | NA | NA | NA | NA |
| 3 | 10 | Hypoechoic | NA | Iso | – | NA | NA | NA | NA |
| 4 | 43 | NA | Iso | NA | + | Hyper | Hypo | Homogeneous | 0.739 |
| 5 | 34 | NA | Iso | NA | + | Hyper | Hypo | Homogeneous | NA |
| 6 | 15 | Hypoechoic | NA | NA | NA | NA | NA | NA | NA |
| 7 | 27 | NA | NA | Iso | + | Hyper | Hypo | Homogeneous | 0.534 |
| 8 | 4 | NA | NA | NA | + | Iso | Hypo | Homogeneous | 0.596 |
| 9 | 8 | NA | NA | NA | – | Iso | Iso | Homogeneous | NA |
| 10 | 2–17 | NA | NA | NA | + | Iso | Iso | Homogeneous | 0.777 (largest) |
Note:—Iso indicates isoattenuating; Hyper, hyperintense; Hypo, hypointense; –, absent; +, present; NA, not available.
a
Compared with muscle.
b
Compared with gray matter.