When there is a clinical suspicion for osseous injury some surgeons prefer CT arthrography for evaluation because fractures of the glenoid are depicted better on CT compared with MRI [16,22]. These inferior glenoid fractures can contribute to recurrent instability and glenoid reconstruction may be necessary.
When the posterior lateral humeral head impacts on the inferior glenoid during an anterior dislocation a fracture of the superior humeral head may occur, called a Hill-Sachs fracture. The presence of a Hill-Sachs fracture is appreciated best on the most superior axial images through the humeral head. Below that level there is a normal flattening of the posterior inferior humeral head contour. Because of that normal flattening a Hill-Sachs lesion should not be diagnosed if it is seen below the level of the coracoid process.
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.