There is small amount of fluid in para-adenexal area and posterior CDS. Please help.

Hello,

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I will try to give you answers to the best of my knowledge.

Small amount of fluid is expected near posterior cul de sac and para adnexal area during ovulation time. Although it can be seen during pelvic inflammatory disease. Multiple follicle grow every month in both the ovaries which later on is dominated by a single follicle which continues to grow to a certain size, and later ruptures releasing the egg. So your 6 mm and 15 mm follicles are normal to be there. Without doing a histopathological examination, it is difficult to tell about the origin of the thick septation but as most of the ovarian cysts are epithelial in origin, so 90 % chances are they are made of some kind of epithelial tissue. Any kind of debris inside the cyst will give rise to echogenicity in ultrasound. It could be blood, it could be tissues of different origin.

There are different types of ovarian cysts, to rule out malignancy you need to do certain tumor markers like CA 125, etc., and MRI or CT scan. As it is receding in size, my best guess that your cyst is some kind of retention cyst of ovary. There is a large possibility that the cyst will regress soon. I think your cyst is an incidental finding as you have stated there is minimal symptom. Your gynecologist will be the best person to advise you in this matter. So discuss with her about the various possibilities and methods of treatment.