The ultrasound and Doppler methods revealed the following PSE-related imaging criteria: round/oval-shaped volume mass, hypoechoic with hyperechoic contour, major endometrioma size was on average 23.9 ± 2.7 mm (95% CI: 18.25-29.45); whereas the minor size - 15.9 ± 2.1 mm (95% CI: 11.65-20.18); presence of vascularization was found in 11 (91.7%) cases and 1(8.3%) case revealed no vascularization, thus showing a statistically significant difference (p=0.0001). There were reported three types of PSE vascularization viz. peripheral, mixed, and central ( Figure 1). Vascularization of the formation was assessed by Doppler scan, which revealed vessels related to the cystic component. These study findings allowed establishing the relevant prevalence of PSE with vascularization, compared to avascular endometriomas. CT study criteria characteristic for PSE were the homogeneous masses with presence of linear infiltration radiating peripherally to the neighboring subcutaneous tissue from the central node. MRI study criteria characteristic for PSE were the presence of microhemorrhagic inclusions (Figure 2). MRI is a more specific method than CT for diagnosing PSE due to the ability to better visualize the source with microhemorrhagic inclusions.