Lung cancer may be seen on chest radiographs and computed tomography (CT) scans. This can be used for both periapical and bitewing radiographs. Hip dysplasia is diagnosed with radiographs of the pelvis. Scintigraphy, plain radiographs, and magnetic resonance imaging may all be useful diagnostically. The lesions are usually ulcers with a ragged, thickened mucosal pattern on contrast radiographs. Complications such as pleural effusion may also be found on chest radiographs. Horses undergoing venography have plain radiographs taken beforehand to allow for comparison. Screening commonly includes clinical examination as well as x-rays such as panoramic radiographs. Most dislocations are apparent on radiographs showing incongruence of the glenohumeral joint. Lumbosacral spine radiographs help in the identification of the skeletal abnormality. Kerley lines are a sign seen on chest radiographs with interstitial pulmonary edema. The bone scan offers several advantages over traditional radiographs. In order to rule out other injuries, hip, pelvis, and knee radiographs are also obtained. In all injuries to the tibial plateau radiographs (commonly called x-rays) are imperative. Most cysts do not cause any symptoms, and are discovered on routine dental radiographs.