With regard to injuries of the extremities caused by birth trauma, ult
rasound allows simultaneous direct evaluation of the surface of osseou
s elements and of cartilaginous and soft-tissue structures as well. Th
us, not only fractures, but also concomitant articular fluid collectio
ns, respectively haematomas and/or dislocation of an epiphysis are dem
onstrated in their initial extent and in their course of healing. Addi
tionally, closed repositions, for instance of a displaced epiphysis, c
an be exactly monitored by ultrasound. A reduced number of roentgenogr
ams as well as renunciation of other imaging modalities are the conseq
uence. Own experiences in 4 patients with birth trauma to the humerus
confirm the high validity of ultrasound in this area as well.