Ovarian cysts are very common in women. There are different types of cysts that can develop, from simple cysts to endometriomas (also known as chocolate cysts) to complex dermoid cysts. Ovarian dermoid cysts, also known as teratomas, are considered complex ovarian cysts that are quite interesting. Some might find them, well, unappealing. They are generally benign, but are nasty little things that can contain a variety of different tissues, including hair and teeth. Super odd, right? Ask your Ultrasound Tech, Katie about them next time you're in for an Ultrasound!