Utility of diffusion-weighted and contrast-enhanced magnetic resonance imaging in diagnosing and differentiating between high- and low-grade uterine endometrial stromal sarcoma

Table 2 MR imaging characteristics between endometrial stromal sarcomas (ESS) and T2-hyperintense leiomyomas

Parameters	ESS	T2-hyperintense leiomyoma	P value
n	20	16
Tumor size (cm)	9.68 ± 3.59	11.66 ± 4.45	0.265
ADC value (× 10^− 3 mm²/sec)	1025.61 ± 130.31	1348.19 ± 162.15	< 0.001 *
Margin			0.014 *
Well-defined	12 (60.0)	16 (100.0)
Ill-defined	8 (40.0)	0 (0.0)
Worm-like nodules	8 (40.0)	0 (0.0)	0.014 *
Marginal nodules	14 (70.0)	0 (0.0)	< 0.001 *
Intratumoral nodules	16 (80.0)	7 (43.8)	0.057
T2 hypointense bands	20 (100.0)	1 (6.3)	< 0.001 *
Feather-like enhancement	10 (50.0)	0 (0.0)	0.003 *
Necrosis	13 (65.0)	1 (6.3)	0.001 *
Hemorrhage	14 (70.0)	2 (12.5)	0.002 *
Tumor enhancement			0.001 *
Less than myometrium	15 (75.0)	5 (31.3)
Equal to myometrium	1 (5.0)	10 (62.5)
Greater than myometrium	4 (20.0)	1 (6.3)

ISSN: 1470-7330