What Are my Options for Deep Tissue Lipoma Removal? Is It Possible That the Lump is Something I Should Be More Concerned About?

In February I noticed a lump underneath my left breast on my rib cage. I went to the doctor and he sent me for an ultrasound and diagnosed it as a lipoma. Because of the location there is pain and tenderness so I was referred to a Cosmetic Surgeon. I went in for Surgery in April under local anesthetic. After cutting me open the surgeon could not find the lipoma and said it was too deep and he could not remove it under local anesthetic. Now, it is more painful and I would still like to remove it.