Ovarian complex cyst. What could it be? A googly case.

Here are the ultrasound scan and color Doppler ultrasound images, both transabdominal and endocavity scans. 

There's obviously a cyst in the left ovary. 

But what can we say about the diagnosis?

Firstly, it's a complex cyst. Note the multiple septations. The transabdominal ultrasound scan suggests a possible hemorrhagic cyst. Indeed, the clinical diagnosis was similar. 

But the endocavity scan suggests something more than this.

Those septae are pretty thick. Also just observe the vessels within the septations. Not a likely finding in a hemorrhagic cyst. 

More along the lines of a serous cystadenoma. 

Final diagnosis: early stages of a serous cystadenoma of the left ovary. 

For more on this visit:

Ovarian serous cystadenoma, sonography