Computed diffusion-weighted imaging for differentiating decidualized endometrioma from ovarian cancer

We evaluated DWI (b=800) with mean ADC values, and signal changes on computed DWI (cDWI) of 20 mural nodules (MNs) in 9 decidualized endometriomas (DEM) during pregnancy and 20 ovarian cancers (OC) retrospectively. MNs in DEM exhibited high to slight high intensity with significantly higher ADC (2.01 +/- 0.26), whereas all OC contained high intensity solid components with lower ADC (1.08 +/- 0.20) (p<0.001). The signal intensity of MNs in DEM decreased on cDWI with higher b values and all MNs showed low intensity on cDWI (b=1500) whereas all 20 OC still contained high intensity solid components on cDWI (b=1500).

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