Patients with greater tuberosity fractures is becoming increasingly common, as is the number of cases of humeral surgical neck fractures. This study investigated the relationship between size of greater tuberosity fragment and occurrence of humeral surgical neck fractures by using CT or MRI tests.

Some humeral surgical neck fractures can be detected through X-ray of shoulder in patients with greater tuberosity fractures. However, some fractures can not be find through conventional X-ray in such patients unless broader CT or MRI tests are required to confirm diagnoses of humeral surgical neck fractures.

Inclusion Criteria:

• Patients 18 years or older with greater tuberosity fractures and shoulder dislocation/ or not who were acute injured were included

Exclusion Criteria:

• Patients with ipsilateral previous proximal humeral fractures and obviously proximal humeral fractures were excluded。

Patient demographics, comorbidities, injury mechanisms and other variables were recorded and calculated for each case.