I had a mammogram a couple of weeks ago and was told that breasts were fine but there was something they wanted checking with ultrasound under my arm. Have been today and the ultrasound showed that the under the arm issue was nothing but has showed up a nodule of around 3mm on my breast. The specialist didn't seem overly concerned and said that due to the size to go back in September to check it again and monitor it with another ultrasound. Not sure what to think? How worried should I be? What is a nodule exactly? Is there anyone with experience of out there with words of wisdom? Have name-changed as my MN usual name is known in my RL. Thanks to anyone out there who posts.