Table 2.
Radiological characteristics of SRMs on CT
| Variables | fpAML (n = 7) | RCC (n = 123) | P-value |
|---|---|---|---|
| Tumor size (mm); median (IQR) | 25 (22–32) | 26 (20–33) | 0.8081 |
| Tumor size (≤2 cm vs. > 2 cm) | 1/6 | 26/97 | 1.0000 |
| Tumor location | |||
| Right/Left | 2/5 | 54/69 | 0.6981 |
| Posterior/anterior | 5/2 | 74/49 | 0.1263 |
| Lateral/Medial | 4/3 | 76/47 | 1.0000 |
| Exophytic/Endophytic | 7/0 | 116/7 | 1.0000 |
| Tumor shape (Round/Non-round) | 2/5 | 68/55 | 0.4660 |
| Tumor attenuation in the unenhanced phase (HU); median (IQR) | 43 (26 − 49) | 31 (25 − 38) | *0.0339 |
| Homogeneity/Heterogeneity | 6/1 | 16/107 | * < 0.0001 |
| OBS (+/−) | 3/4 | 0/123 | * < 0.0001 |
| AI (+/−) | 4/3 | 9/114 | *0.0018 |
| CV (+/−) | 0/7 | 56/67 | *0.0192 |
CT, computed tomography; fpAML, fat-poor angiomyolipomas; RCC, renal cell carcinoma; IQR, interquartile range; HU, Hounsfield Unit; OBS, overflowing beer sign; AI, angular interface; CV, collateral vessel. *p < 0.05