Incidentaloma

As unusual as a term in medical science can be, an incidentaloma is exactly what it sounds like—a tumor that is found completely by coincidence while looking for something else. It has no signs or symptoms and generally is found during a scanning or x-ray procedure and reported by the radiologist. It comes as a completely “incidental” finding and often causes a significant quandary both in clinical and insurance medicine.

http://www.brokerworldmag.com/articles/articles.php?articleid=2796