Hi, thanks for writing to HCM.
If I were your treating Doctor for this case of a painless hard mobile, marble-sized lump on the collarbone, I would come up with three possibilities, these include:
1. lymph nodes due to some chronic disorder like local infection,
tuberculosis,
lymphoma or chronic throat /
neck infection or even malignant diseases in elderly people!
2. The second possibility is of benign and simple conditions like lipoma or neurofibroma; there is nothing to worry about these!
3. The last possibility is of sebaceous cyst or some other cysts like bursa, sebaceous cyst, branchial cyst or lymphatic cysts! Nothing to worry about these also!
I suggest you to go for a needle
biopsy and
ultrasound of the lumps for confirmation and to relieve your concerns!
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.
Wishing you good health.