I just noticed a 3.5mm × 2.5mm painless lump in the superficial fatty tissue of my left upper outer thigh. I had a sonogram. (my Dr sent me without a physical exam) and am waiting for results but my understanding is a sonogram is often inconclusive for this type of issue. The lump is firm (not hard) smooth and moves around very easily. Its is dome shaped not round. Is it likely something benign like a lipoma or a sebatious cyst? It's not protruding but can be felt if I press. Thank you.