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

Table 1

Perfusion patterns in adnexal masses on 2D-CEUS.

Pattern		characteristics
Type I	Cyst wall perfusion, thin wall (<3 mm)	A: no perfusion in cyst; B: fine septa (≤1 mm) perfusion visible within the cyst
Type II	Cyst wall perfusion, thin wall (≥3 mm)	A: no perfusion in cyst; B: perfusion of papilla on inner wall of the cyst (< 3 mm) and/or incomplete/complete septa perfusion, with uneven thickness (1–3 mm)
Type III	Perfusion within the cyst	A: perfusion of papilla on inner wall of the cyst (≥3 mm) and/or incomplete/complete septa perfusion, with uneven thickness, which can be ≥3 mm; B: perfusion from periphery to the center of the tumor, or homogeneous perfusion of the mass, or sparse network perfusion of blood vessel
Type IV	Perfusion within the cys	Inhomogeneous perfusion from one or more points in the mass, with or without perfusion defect area within the mass