[Radiologic study on postnatal ossification of the first metatarsal bone].

Background: Classical descriptions of the ossification of the first metatarsal bone show the existence of a single proximal secondary ossification nucleus, mimicking the typical ossification of a phalanx. However, there are studies that show the presence of a second distal ossification nucleus and discuss its nature: epiphysis or pseudoepiphysis. The objective of the study is to establish the prevalence of such distal nucleus, determine its role in the growth of the radius and its relation with different qualitative variables.