Can a adnexal cyst turn cancerous?

Hello doctor,

I have attached a copy of the abdominal CT scan with contrast that was taken a few days ago. Three days before I took the CT scan, I had been experiencing abdominal cramping with diarrhea and bloody stools with mucus; however, my stools now look normal with no blood, and the cramping has subsided. I visited my PCP, and she has ordered stool sample tests to check for food poisoning, and I am awaiting those results since she suspected possible diverticulitis. As you will see, the scan shows a bicornate uterus (which I knew about) with a complex 4.8 cm right adnexal cyst. I am still pre-menopausal with mostly regular menstrual periods, am 54 years old, and am otherwise healthy. I have had small ovarian cysts in the past (which I believe were functional or follicular), and they had been cleared up. I have messaged my gynecologist, and a transvaginal ultrasound has been ordered. The report showing the complex cyst is making me worried. Is it anything problematic, and does it point to cancer? I had my last annual visit with my gynecologist a few months back, and all was fine. Would the CT scan with contrast have been able to detect whether it was malignant? Also, other things mentioned in the report, like nodules in the thorax, several small liver cysts, and renal cysts, anything worrisome? Please advise.

Thank you.

Thank you doctor,

That makes me feel better. I hope that the transvaginal US can shed more light on precisely what it is. Generally speaking, would you say that if the radiologist who reviewed the CT scan saw indicators that it was potentially malignant (which I understand would be things like a thick septum, papillary growths, etc.), there would have been mention of that on the written report?