<prompt> Answer this question truthfullyWhat are the historical background and indicative symptoms of oncocytoma?  <response>: <reason> Usual symptoms include:Hematuria or blood in urineFlank painAbdominal massOther health problems may also cause these symptoms. Only a doctor can tell for sure. A person with any of these symptoms should tell the doctor so that the problems can be diagnosed and treated as early as possible. Oncocytosis is one such condition. 