Hi there. The difference is your friends thyroid is giving off reflective ultrasound waves the same as the surrounding area and yours isn't. So essentially you don't have the same problem as your friend.
I suggest you go back to your doctor and get them to run the full thyroid blood tests as well. Free T3 Free T4, TSH and anti-bodies. I would be asking if they intend to do a biopsy as well, it seems your nodule is semi-solid so could do with further investigations. (Don't worry 90% of them are not cancer!)
Do you have any symptoms of thryoid problems, weight gain, hair loss, etc?
I know the doctor did do blood test on my thyroid & it came back normal. I have a lot to the symptoms of thryoid problems like weight gain, constipation, fatigue & heavy periods. That is why I pushed having the ultrasound because I felt like something just wasn't right. Thank you for the information. Just keep me in your prayers!
Bumping this as she reposted same question today. :)