As to Social Security Administration "back benefits" the initial question is whether your condition, either the cancer or amputation, met one of Social Security's listed impairments, which have certain criteria that must be met for a person to qualify, that would entitle you to benefits.
If so, you might be entitled to back benefits. I cannot answer whether your condition met one of the listed impairments as there is insufficient information in your Question or Question Detail to answer.
As to current or future benefits, if you are currently working full time then you would not be eligible for Social Security benefits now. If you are not working or lose your job, you might be entitled to Social Security Disability benefits although it would be hard to prove you are disabled as you have been working since you were 16 despite the loss not having a right shoulder or arm.
I cannot comment on the issue about your father's possible exposure to Agent Orange and your sarcoma as that is beyond the scope of this Law Area.
Answered on Aug 13th, 2012 at 12:01 PM