I need advice. My DS (26 and at home) has found a lump on his arm. It’s hard and immobile. He is not worried but I am very. I managed to persuade him to phone the GP and they’ve given him a telephone appointment in a week’s time. Is a potentially cancerous lump an emergency ? Would I be justified in trying to get him an earlier appointment ? I think these things need to be seen asap and I’m not sure the receptionist would have understood the nature of the lump.