Hi, I am 25 & have always been slim so my upper half of my body has always been boney. However around 2 months ago I noticed a new protruding lump on my chest below my collar bone but above my breast. I thought maybe it was a pulled muscle as it seemed to follow along a muscle or bone in that area. I have lost just a little over 1 stone in just 3 months & haven't been feeling myself so I made an appointment with the doc who checked my bloods which came back OK so he took a look at this lump & had referred me for an ultrasound. While the nurse was in the middle of doing the scan she asked me did I have pain in my back with it.. (unsure why) and how long I've had it for. I'm just thinking the only reason she would have asked those questions during the scan was because she has seen something & I'm now sick with worry  as I'm just putting together a new lump and significant weight loss with no known cause & thinking the worst. I won't have my results for 10 days she wasn't able to tell me anything during the scan. Just wondering if anyone has been through something similar and knows what this could be. It is a long hard lump which doesn't move under my skin. Thank you.