My youngest son said, "Mom, I've got a weird spot on my leg." He showed me his lower calf, and there is a hard lump shaped like the first two digits of your pointer finger and about that size. I'm freaking as we have a friend whose daughter is currently dealing with osteosarcoma - diagnosed by a lump behind her knee. It is painful - that much I'm glad for (because doesn't a cancerous tumor usually cause no pain?). Getting an appt, but can anyone alleviate some fears? Doesn't look like anything to look at it-'no discoloration, no 3D raised lump. He's 14, just starting to grow, active, and a bit of a hypochondriac - so I know he's worrying. Thanks.