Recommended X-ray Views for Proximal Humerus Neck Fracture at 1 Week Follow-up
For a one-week follow-up of a proximal humerus neck fracture, obtain a standard three-view trauma series: anteroposterior (AP) views in both internal and external rotation, plus either an axillary or scapular Y-view 1.
Essential Views and Their Purpose
The Standard Three-View Series
AP in Internal Rotation: Critical for assessing the neck-shaft angle, which is the most important predictor of functional outcome. Varus angulation measured on this view directly correlates with decreased shoulder function—every 10° of varus deformity results in approximately 4° loss of forward flexion 2.
AP in External Rotation: Provides complementary assessment of fracture alignment and helps evaluate the humeral head position from a different rotational perspective 1.
Axillary or Scapular Y-View: This is vital and non-negotiable 1. The Y-view is particularly important because:
- It can detect glenohumeral dislocations that are easily missed on AP views alone 1
- It allows measurement of the greater tuberosity index (GTI), which is a powerful predictor of outcome—every 10% increase in GTI correlates with 7° loss of flexion and 5° loss of external rotation 2
- Changes in angulation on the Y-view between initial injury and one-week follow-up are the most important predictors of long-term functional outcome 3
Clinical Decision-Making Based on These Views
What You're Looking For at One Week
The one-week radiographs serve a critical purpose: identifying secondary displacement that may warrant surgical intervention 4. Specifically assess:
Neck-shaft angle on AP-internal rotation: Varus malunion is defined as <125° 5. This measurement is essential because it predicts functional impairment.
Greater tuberosity position on Y-view: A GTI ≥1.15 combined with varus angulation <119° identifies patients at highest risk for poor functional outcome 2.
Fracture comminution: This is the single most important predictor of secondary displacement—present in 23% of patients but accounts for the majority of cases requiring delayed surgery 4.
Key Clinical Pitfalls
Common Mistakes to Avoid
Don't skip the axillary or Y-view: AP views alone miss critical information about alignment and can misclassify dislocations 1. This is not optional.
Don't obtain supine radiographs: Shoulder malalignment is underrepresented on supine films; images should be obtained upright whenever possible 6.
Don't assume displacement will improve with "hanging": Recent evidence demonstrates that apart from type A fractures showing some improvement in head-shaft angle, displacement does not reduce over time with conservative treatment 7. Surgical decision-making should occur early, not delayed hoping for spontaneous improvement.
When Serial Radiographs May Be Unnecessary
For truly one-part fractures without comminution, serial radiological evaluation may be redundant—91% remain stable and only 5% ultimately require surgery 4. However, at one week post-injury with a known proximal humerus neck fracture, you're already in the surveillance period where secondary displacement is most likely to declare itself.
Advanced Considerations
If the standard views are inadequate or if you're considering surgical intervention, CT without contrast may be warranted. CT changes clinical management in up to 41% of proximal humeral fractures by better characterizing fracture morphology, particularly in comminuted patterns 1.
However, for routine one-week follow-up of a known neck fracture, the standard three-view series provides all necessary information for clinical decision-making regarding stability and need for surgical intervention.