My 16 year old daughter had a sonogram that showed a 12x10x10 mass between her urithra and bladder. The imaging said it was most likely a submucosal mass, they also said this may be a neoplastic bladder mass. She had a renal sonography done and the doctor said he didn t see any mass. She still has lots of unusual symptoms. Frequently urinating, blood in the urine, pain with urinating and now she loosing lots of hair. We go to a different specialist tomorrow. My question is, is it common for there to be a mass of this size on a sonogram and it be a mistake?