This injury is considered in literature as the “least common of all tendon injuries”, and for this reason often misdiagnosed; I suggest always to pay attention when you find something “calcific“ after a trauma, especially with ultrasound imaging.
Today I show you the case of complete triceps tendon avulsion occurred after a falling injury that had happened eight days back.

Comparative examination between ultrasound scan and Sagittal T2w Mri Imaging (0.3 Tesla)
The X-ray examination still assumes great importance in this kind of injury.

Sagittal T2w Mri exam (0.3 Tesla) and plain radiograph of the same patient.