- See:
-
Radiographic Studies for the Shoulder:
-
Posterior Shoulder Dislocation:
- Findings Seen on Specific Radiographic Views:
-
Axillary View:
-
reverse hill sachs lesion:
-
AP of the Shoulder:
- because humerus is internally rotated, the greater tuberosity will not be seen laterally, but
rather will be seen directly in front of the humeral head;
- subacromial dislocation:
-
posterior dislocation may leave humeral head in subacromial position so that humeral head lies behind the glenoid;
- subglenoid:
head is beneath and behind the glenoid;
- subspinous: in which head is medial to acromion & beneath spine of scapula;
-
loss of elliptical overlap:
- on the standard AP of the shoulder (perpendicular to the body and not the scapula), the
glenoid will be shown to have an oblique profile;
- normally the humeral head will overlap the posterior portion of the obliquely profiled glenoid, but in
the case of posterior dislocation, the normal overlap will not be present;
-
vacant glenoid sign:
- refers to void seen in anterior half of glenoid fossa in posterior dislocations;
-
6 mm rim sign:
- space between anterior rim of glenoid & humeral head > 6 mm is highly
suggestive of a
posterior dislocation;
