Proximal radioulnar translocation is an extremely rare injury. Only se
ven cases have been reported previously, The authors report the case o
f a 6-year-old girl whose translocation was undiagnosed for more than
2 weeks, Definitive treatment required open reduction and use of a rad
iocapitellar pin to stabilize the proximal radius, At the 2-year follo
wup, the patient has no symptoms and has resumed full activity with ne
arly full range of motion, To ensure early diagnosis of rare types of
elbow dislocations, it is important to recognize the lack of supinatio
n and disruption of the radiocapitellar relationship on radiographs.