Hi,
In my opinion I don’t think this is cancer…. It could be a benign growth of bone tissue on top of existing normal bone that can be quite prominent in slender people,or just a cartilage inflammation as the tests you had,have shown.This can occur in case of trivial injury, over strain,or an inflammatory process.
If the lump persists,enlarges or becomes too painful,I would suggest seeing a Breast Specialist who might order a CT scan or MRI to determine if this lump is of concern or if it needs to be biopsied or even excised.
Best wishes…
I personally would want an answer .... and would go for whatever testing was recommended to get one. All tests "see" things differently as well as "see: different things and this would be true with MRI. If this was advised I would proceed but if not I would get a second (or third if necessary) opinion. I'm not sure what type of Physicians you have seen but an Orthopaedic Specialist might be another option. Everything has a "reason" for happening and I fee that it's always best to discover that reason. This lump could be something very innocent but I would have to know that too. Regards ....
Thank you both for your reassurance. I will book to see an Orthopaedic Specialist as suggested. As you say, something has caused it so I do need to find out what (for my own peace of mind more than anything!) thanks again.