Cancer of the gallbladder may also be found incidentally after surgical removal of the gallbladder, with 1–3% of cancers identified in this way. Gallbladder polyps are mostly benign growths or lesions resembling growths that form in the gallbladder wall, and are only associated with cancer when they are larger in size (>1 cm). Cholesterol polyps, often associated with cholesterolosis ("strawberry gallbladder", a change in the gallbladder wall due to excess cholesterol), often cause no symptoms and are thus often detected in this way.