Lateral radiographic view of the reticulum, showing two penetrating reticular foreign bodies in a cow with traumatic reticuloperitonitis. A screw has penetrated the cranial reticular wall, and a nail has penetrated the caudal reticular wall. A magnet is also present in the reticulum and is in contact with the screw. 1, elbow; 2, sternum; 3, rib; 4, diaphragm; 5, reticulum; 6, screw; 7, nail; 8, magnet in reticulum; Cr, cranial; Cd, caudal.