Hi - I am a 27-year old female with a hard, immovable, painless lump on my left clavicle near where it meets my sternum. It is partially on the bone, and partially under it, and seems to extend laterally to my shoulder. I have had it for at least six weeks, have had no ilnesses or trauma, and a x-ray has ruled out a bone injury. I recently saw a provider for a routine medical issue, and they noticed the lump and suggested I go back to my primary provider and request an ultrasound, as they were concerned by the position and feel of the lump. I'm wondering whether I should skip the ultrasound and ask for a biopsy instead. What do you think?