Hi, my mum has been to the doctor 3 times as she had blood in her urine. The GP refused to send the samples off as the urine wasn't cloudy. She has also been to the GP 4 times in the last 2 years with pain under her left rib. In October she started getting severe pain when weeing which has developed into slight incontinence. The GP has been treating her for a UTI to no effect. She finally had an ultrasound this week which showed a 6cm mass in her bladder, her left kidney is totally blocked, and has been for some time, and her right kidney is almost blocked. Is this likely to be stage 4 cancer, a benign mass, has her GP been lax ? Any advice/thoughts/help would be greatly appreciated