An Undescribed Monteggia Type 3 Equivalent Lesion: Lateral Dislocation of Radial Head with Both-Bone Forearm Fracture

Table 1

Lateral radial head dislocation with concomitant both-bone forearm fracture fits in the Bado classification as a type 3 equivalent lesion, which has never been described [2].

Bado classification
	Radial head dislocation	Forearm fracture	Equivalents
Type I	Anterior	Ulnar with anterior angulation	Isolated radial head dislocation; Isolated radial neck fracture; Diaphyseal ulnar fracture with radial neck fracture; Diaphyseal ulnar fracture with fracture of the proximal third of radius; Diaphyseal ulnar and olecranon fracture with anterior dislocation of the radial head; Diaphyseal ulnar, posterior dislocation of the elbow ± fracture of the proximal third of radius
Type II	Posterior	Ulnar with posterior angulation	Epiphyseal fracture of dislocated radial head
Type III	Lateral	Proximal ulna	—
Type IV	Anterior	Both bones	—