Hi, dear I have gone through your question. I can understand your concern. He may have some soft tissue tumor like lipoma, neurofibroma or dermatofibroma. Or it may be some other benign lesion. He should go for biopsy of that lump. It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health.