Fig. 2.

Ultrasound images of the ovary: (B1–B2) benign conditions (M1–M2) malignant tumors. B1: histology: endometrioma; echo: characteristic diffuse, low-level echoes of the endometrioma giving a solid appearance. B2: histology: endometrioma; echo: characteristic diffuse, low-level echoes of the endometrioma giving a solid appearance. M1: histology: borderline malignant tumor; echo: multiloculate echo-pattern with multiple thick septa. M2: histology: serous carcinoma; echo: homogenous hyperechogen