Value of Transvaginal Two-Dimensional Contrast-Enhanced Ultrasonography in Diagnosing Atypical Ovarian Corpus Luteum Hematoma

Table 7

Comparing the perfusion intensity between AT-OCLH and nonluteal cystic lesions.

Group; (N)	Cases	Perfusion intensity
		Grade 1	Grade 2	Grade 3
AT-OCLH	23	0	3	20
Non-luteum cystic lesion group	12	3	7	2
U value			36.5
P		< 0.001

Note. Mann–Whitney U test, P < 0.05.