Hi.
How long have you noticed the knot on your collar bone or clavicle?
By your description, it seems that the knot is part of the collar bone. It would be hard to tell exactly
whether the knot you have on your collar bone is cancerous or not. Since there may be a history of trauma as
you mentioned, a fracture on the collar bone may have resulted causing the deformity. Fracture of the collar
bone most commonly occurs on the center, and is associated with pain and tenderness. Other consideration
would be a bone tumor (both benign and malignant).
What you can do now is to have an xray done on the collar bone. If the xray finding is suggestive of bone
cancer, other imaging modalities can be done like a bone scan. Biopsy can then confirm if the bone tumor is
malignant or not.
