Case 1
Anterior Shoulder Dislocation (ABCS Approach):​
A – Alignment
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Humeral head is displaced anterior and inferior to the glenoid fossa.
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On AP view, humeral head appears medial and below the glenoid.
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On Y-scapular view, the humeral head sits anterior to the “Y” junction, confirming dislocation.
Case courtesy of Jeremy Jones, Radiopaedia.org, rID: 7132
B – Bones
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Inspect cortical outline of humerus, glenoid, and clavicle for fractures.
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Common associated fractures: Hill-Sachs lesion (posterolateral humeral head impaction) and Bankart lesion (anteroinferior glenoid rim fracture).
Case courtesy of Frank Gaillard, Radiopaedia.org, rID: 7506
C – Cartilage/Joint spaces
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Glenohumeral joint space is disrupted.
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AC joint usually preserved (but check).
S – Soft tissues
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Soft tissue swelling around the joint.
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Look for displaced fat pads or calcifications.
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Consider risk to axillary nerve and vascular structures — though not seen directly, keep in mind clinically.
Pearl: Always get post-reduction films to confirm alignment and rule out associated fractures.