Re: bilateral adnexal cyst
Ovarian (adnexal) cysts are very common. They oftentimes don't even cause symptoms. Most go away on their own. There's a condition called Polycystic Ovary Syndrome (PCOS) that's a metabolic disorder of insulin resistance with one of the common characteristics being many cysts on both ovaries.
Rarely, ovarian cysts can become cancerous. But a woman's lifetime risk is less than 2% if she doesn't have a strong family history of ovarian cancer. Ovarian cysts that may be cancerous will look suspicious on ultrasound and don't tend to resolve on their own. There are some non-cancerous (benign) cysts that don't go away on their own and if they continue to grow need to be surgically removed via cystectomy (removal of just the cyst) or oophorectomy (removal of the ovary).