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Coracoid tip position on frontal radiographs of the shoulder: a predictor of common shoulder pathologies?

¹ Department of Orthopaedic Surgery, Ludwig Maximilians Universitaet Munich, Germany, ² Department of Orthopaedic Surgery, Technische Universitaet Munich, Germany and ³ Department of Radiology, Ludwig Maximilians Universitaet Munich, Germany

View larger version (15K): [in a new window]   Figure 1. Measurement of coracoid tip position in the true anterior–posterior view of the shoulder. Glenoid cavity plane (line 1, tangent on the inferior and superior glenoid rim); glenoid cavity height (D1, distance between inferior and superior glenoid rim); parallel of line 1 at level of coracoid tip (line 2); inferior coracoid extension (D2, distance between superior glenoid rim and coracoid tip).

View larger version (102K): [in a new window]   Figure 2. Coracoid variants on the true anterior posterior view of the shoulder (a) type I coracoid: coracoid tip (arrow) projects at level of the inferior glenoid half (b) type II coracoid: coracoid tip (arrow) projects at level of the superior glenoid half.