I just found out I have a 7mmx5mmx4mm complex cystic mass that is anechogenic and contains an internal projection of a cluster of small cysts with irregular walls and hyperechogenic foci which appears avascular. i go for an SIS ultrasound and MRI next week but am thinking cancer immediately. O Rad is 4. Is this dangerous? If cancer, how likely is this to spread? My PAP was normal. Images of uterus suggest adenmyosis and i have a 3.5 cm cyst complex mass without surrounding blood flow. they believe it is atypical endometrioma vs dermoid. i cant stop thinking and worrying which i know doesn't help. Im 44 with irregular periods for last year.