Table 2.
Standard B-Mode and Contrast-Enhanced Harmonic Endoscopic Ultrasonographic Features
| Features | Leiomyoma (n=5) | Low-grade malignancy GIST (n=20) | High-grade malignancy GIST (n=12) | p-value |
|---|---|---|---|---|
| Standard B-mode EUS findings | ||||
| Size, mm | 29 (19–34) | 27 (16–50) | 34 (15–65) | 0.824 |
| Heterogeneity | 3 (60.0) | 11 (55.0) | 9 (75.0) | 0.397 |
| Irregular margin | 1 (20.0) | 2 (10.0) | 3 (25.0) | 0.559 |
| CEH-EUS findings | ||||
| Irregular vessels | 0 | 11 (55.0) | 8 (66.7) | 0.028 |
| Heterogeneous perfusion | 2 (40.0) | 12 (60.0) | 5 (6.2) | 0.767 |
| Hyperechoic foci | 1 (20.0) | 10 (50.0) | 8 (66.7) | 0.090 |
| Nonenhancing spots | 0 | 11 (55.0) | 8 (66.7) | 0.028* |
Data are presented as median (range) or number (%).
GIST, gastrointestinal stromal tumor; EUS, endoscopic ultrasonography; CEH-EUS, contrast-enhanced harmonic EUS.
*
Linear-by-linear association.