A, Standing anteroposterior view of both feet on same cassette allows comparison of sesamoids. This is especially helpful if fracture is suspected but bipartite sesamoid is present. Accessory sesamoids (arrows) are normal, although uncommon, findings. B, Oblique view profiles fibular sesamoid. Note cystic fibular sesamoid on right foot. This probably represents old fracture through syndesmotic union of bipartite sesamoid.