Table 1 Comparison of magnetic resonance imaging characteristics of thecomas, fibrothecomas, and malignant pelvic solid masses
Image features | Thecoma | Fibrothecoma | Total | Malignant pelvic solid mass |
|---|---|---|---|---|
Shape | ||||
Round/oval | 83.3 %(5/6)a | 70.0 %(21/30) | 72.2 %(26/36) | 17.5 %(7/40) |
Lobulated | 16.7 %(1/6) | 26.7 %(8/30) | 25.0 %(9/36) | 7.5 %(3/40) |
Irregular | 0 | 3.3 %(1/30) | 2.8 %(1/36) | 75.0 %(30/40) |
Signal intensity | ||||
T1WI | ||||
Iso- | 100 %(6/6) | 100 %(30/30) | 100 % (36/36) | 100 %(40/40) |
T2WI | ||||
Hypo- | 16.7 %(1/6) | 60.0 %(18/30) | 52.8 %(19/36) | 0 |
Iso- | 50.0 %(3/6) | 20.0 %(6/30) | 25.0 %(9/36) | 0 |
Hyper- | 33.3 %(2/6) | 0 | 5.6 %(2/36) | 100 %(40/40) |
Mixed | 0 | 20.0 %(6/30) | 16.7 %(6/36) | 0 |
Enhancement degree | ||||
Minor | 0 | 70.0 %(21/30) | 58.3 %(21/36) | 10.0 %(4/40) |
Mild | 66.7 %(4/6) | 30.0 %(9/30) | 36.1 %(13/36) | 50.0 %(20/40) |
Marked | 33.3 %(2/6) | 0 | 5.6 %(2/36) | 35.0 %(14/40) |
Severe | 0 | 0 | 0 | 5.0 %(2/40) |
DWI signal | ||||
Grade 1 | 0 | 65.5 % (19/29) | 54.3 %(19/35) | 2.5 %(1/40) |
Grade 2 | 33.3 %(2/6) | 27.6 %(8/29) | 28.6 %(10/35) | 10.0 %(4/40) |
Grade 3 | 66.7 %(4/6) | 6.9 %(2/29) | 17.1 %(6/35) | 87.5 %(35/40) |
Pelvic fluid | ||||
None | 0 | 17.9 %(5/28) | 14.7 %(5/34) | 12.5 %(5/40) |
Present | 100 %(6/6) | 82.1 %(23/28) | 85.3 %(29/34) | 87.5 %(35/40) |
Minor | 50.0 %(3/6) | 46.4 %(13/28) | 47.1 %(16/34) | 15.0 %(6/40) |
Small | 33.3 %(2/6) | 25.0 %(7/28) | 26.5 %(9/34) | 15.0 %(6/40) |
Large | 16.7 %(1/6) | 10.7 %(3/28) | 11.8 %(4/34) | 57.5 %(23/40) |
Border | ||||
Clear | 100 %(6/6) | 100 %(30/30) | 100 %(36/36) | 27.5 %(11/40) |
Not clear | 0 | 0 | 0 | 72.5 %(29/40) |
Capsule | ||||
Present | 100 %(6/6) | 96.7 %(29/30) | 97.2 %(35/36) | 52.5 %(21/40) |
Absent | 0 | 3.3 %(1/30) | 2.8 %(1/36) | 47.5 %(19/40) |