Comparison of various imaging modalities regarding their diagnostic performance in differentiating benign and malignant omental masses
| Author | N | Imaging modality | Parameter predictor of malignancy | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | P value |
| Salman et al*6 | 100 | B-mode US | omental thickness of ≥19.5 | 89.3 | 84.1 | 87.7 | 86.0 | <0.001 |
| Trenker et al8 | 44 | CEUS | Inhomogeneous enhancement | – | – | – | – | 0.05 |
| Inan et al19 | 24 | Colour Doppler US | RI | – | – | – | – | 0.08 |
| Perez et al34 | 163† | CT | Infiltrative morphology | 80.5 | 66.7 | 97.6 | 16.7 | <0.001 |
| Doshi et al‡, 35 | 19 | MRI | Hyperintensity on high b-value diffusion-weighted imaging | 87.5 | 100 | 100 | 91.7 | <0.001 |
| Zhang et al5 | 118 | Strain elastography | Strain ratio§ >2.6 | 80.3 | 76.6 | 83.8 | 72.0 | <0.01 |
| Elasticity score¶ >3 | 93.0 | 93.6 | 95.7 | 89.8 | <0.01 | |||
| Present study | 106 | ARFI-elastography | Mean velocity >1.97 m/s | 76.9 | 85.4 | 89.3 | 70.0 | <0.001 |
*This study involved 100 patients with ascites (56 peritoneal carcinomatosis and 44 tuberculous peritonitis).
†This study included 154 malignant and nine benign omental lesions.
‡The study included 11 benign and eight malignant omental lesions.
§Using abdominal wall fat as a reference.
¶Score based on evaluation of colour topography (1: uniformly green, 2: green and blue but predominantly green, 3: blue and green but predominantly blue, 4: uniformly blue).
ARFI, acoustic radiation force impulse; CEUS, contrast enhanced US; NPV, negative predictive value; PPV, positive predictive value; RI, Resistive Index; US, ultrasound.