fractures are linear opacities found in the cortex of lower-extremity
bones and may evolve into complete fractures. Also called stress
or insufficiency fractures, they occur more frequently than
complete transverse fractures. They usually occur on the tension,
or convex, side of a bowed, weight-bearing long bone, as seen
in this radiograph of this patient with Paget's disease. Fissure
fractures can be single or multiple.