Brachialis muscle tendon insertion avulsion fracture in a 6-year-old child.

To cite: Crosswell S, Mbah CA, Hussain A, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2013-202420 DESCRIPTION A 6-year-old boy, who fell while playing at school, presented to the fracture clinic with a suspected right distal radius fracture. On examination, the child was tender over the dorsal aspect of the distal radius and also had pain and stiffness around the elbow joint with a lack of the last 25° of elbow flexion. An acute haemarthrosis was also suspected at presentation. Plain anteroposterior (AP) and lateral radiographs of the elbow joint revealed an abnormal calcification superimposed on the anterior aspect of the coronoid process (figure 1A, B), which had not been visualised on plain radiographs in A&E. A CT scan, as suggested by the radiologists, revealed a 3 cm avulsion fracture of the anterior