Table 2. MRI characteristics of 21 OCCCs in 19 patients.
| No. /side | *Size (cm) | Shape/Edge | Cystic/solid | MR SI of the cyst | MR SI of the solid protrusion (first group)/solid portions (second group) | Pattern/Number of solid protrusion | |||
|---|---|---|---|---|---|---|---|---|---|
| T1 | T2 | T1 | T2 | +C | |||||
| 1/R | 10×9 | Oval/WD | Multi | High | Very high | Slightly high | Iso- | Enhanced | Irregular;inequality of size (+) |
| 2/R | 10.5×12 | Oval/WD | Uni | Very high | Very high | Slightly low | Iso- | Slightly hetero-enhanced | Irregular; inequality of size (+) |
| 3/L | 7.5×7 | Oval/WD | Multi | Low | Very high | Hetero-slightly high | Hetero-iso-high | Enhanced | Irregular; inequality of size(+) |
| 4/L | 10.5×8 | Oval/WD | Uni | High | Very high | Slightly low | Hetero-slightly high | Enhanced | Irregular; inequality of size (++) |
| 5/R | 6×4.5 | Irreg./WD | Multi | Very high | Very high | Slightly low | Iso- | Hetero- enhanced | Irregular; inequality of size (+) |
| 6/L | 15×11 | Irreg./WD | Uni | High | Very high | Slightly high | Hetero-iso-slightly high | Enhanced | Irregular; inequality of size (+) |
| 7/R | 18×11 | Irreg./WD | Multi | High | Very high | Iso-(high) | Iso-(high) | Enhanced | Irregular inequality of size (+ +) |
| 8/R | 21×16 | Irreg./WD | Multi | Low | Very high | Hetero- iso-slightly high | Hetero-iso- high | Enhanced | Irregular; inequality of size (++) |
| 9/L | 10×7.5 | Irreg./WD | Multi | Very high | Very high | Iso- | Hetero-iso- | Enhanced | Irregular; inequality of size (++) |
| 10/L | 13×11 | Irreg./WD | Multi | Hetero-high low | High | Iso- slightly high | Iso- | Hetero- delayed enhanced | Irregular;inequality of size (+) |
| 10/R | 2.5×1.5 | Irreg./WD | Multi | Iso- low very high | Iso-very high | Slightly high | Iso- | Hetero- delayed enhanced | Irregular;inequality of size (+) |
| 11/R | 10×8 | Irreg./WD | Uni | Low | Very high | Slightly high | Hetero-slightly high | Hetero- delayed enhanced | Irregular;inequality of size (+) |
| 12/L | 9×5 | Oval/WD | Solid with large cyst | Very high | Very high | Iso- | Slightly high | Hetero- slightly and delayed enhanced | |
| 13/L | 9.3×8.5 | Irreg./ID | Solid with small cyst | Low | High | Iso- low | High | Hetero- delayed enhanced | |
| 14/L | 18×14 | Irreg./WD | Solid with small cyst | Low | High | Slightly high | High | Hetero- delayed enhanced | |
| 15/L | 10×9 | Irreg./WD | Solid with a few necrosis | Low | High | Iso- | Iso- | Hetero- delayed enhanced | |
| 16/R | 9×6 | Oval/WD | solid with a few cyst | Low | High | Iso- | Hetero- high | Hetero- delayed enhanced | |
| 17/L | 10×8 | Irreg./WD | Solid with many cystic or necrosis areas | Low | High | Hetero- Low and high | Hetero- high | Hetero- delayed enhanced | |
| 17/R | 5×5 | Irreg./ID | Solid with cysts | Iso- | High | Iso- | Hetero- high | Hetero- delayed enhanced | |
| 18/L | 12×8 | Irreg./WD | Solid with cyst | Low | High | Iso- | Hetero- High | Hetero- delayed enhanced | |
| 19/R | 10×6 | Oval/WD | Solid with large necrosis | Low | Hetero- high | Iso- | High | Hetero- delayed enhanced | |
Note:*Size: the largest tumor diameter observed on axial scans. Irreg., irregular; WD, well-defined; ID, ill-defined; Multi,multilocular cystic mass; Uni,unilocular cystic mass; Iso-,isointensity signal; High, high signal intensity; Low, low signal intensity; Very high, isointensity of fat on T1WIs; Very high on T2WIs, same or higher than the intensity of urine or spinal fluid; Inequality of size +, a few; Inequality of size + +, many in number; Signal intensity, SI; Hetero-, heterogeneous