HI new to this site so need some honest advice please .My dad is 67 previously had lung cancer and has been cancer clear for 4 years .Summer of this year he noticed awful pain in his shoulder .He can't move his arm now .He in the past two months has developed 4 lumps .Large swellings that are hard .He has had a scan of his neck and exray which showed nothing .He now is loosing weight and is relying on tramadol .The lumps are on the top of shoulder one on his back .Forearm and a smaller one on the front of his shoulder .My dad is in agony and we have noticed a strange smell now .Any ideas please we are at a loss