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Avascular Necrosis and Related Disorders


Welcome to Avascular necrosis and related disorders! Avascular necrosis (AVN) is a common disorder that clinicians must be aware of due to its prevalence and the fact that if treated early, the prognosis is quite favorable. Another reason for becoming familiar with avascular necrosis is that there are many entities that mimic its appearance. Avascular necrosis and entities that appear similar on a radiograph are sometimes grouped under the broad heading of OSTEOCHONDROSIS. You will learn that there are three main headings that fall within the realm of osteochondrosis...


These different categories are then broken down into specific body areas correlated with radiographical findings and pertinent clinical information.

Definitions, pathogenesis with radiographical correlation, and etiology will also be discussed. These are included not to put you to sleep before you hardly get started, but to aid in the overall understanding of osteochondrosis that will help you in delivering the best care to your patients.


  1. To be able to understand the concept and categories of osteochondroses.
  2. To be able to tell the difference radiographically between normal variation and true osteonecrosis.
  3. To understand the most appropriate imaging of different osteochondroses.

Regarding "navigation" through this site, we have made every attempt to make it as user-friendly as possible. On the left hand side of each page, you will see the outline for the course, and you may go directly to a certain portion if you wish. Otherwise, to go straight through the course, by clicking on the "next" button at the bottom of each page to go to the subsequent page until you reach the self assessment at the end of the course. There you will be tested with a series of multiple choice questions.

Lastly, we have attempted to "liven" up the site with randomly intermixed audio clips to be found on the full size images of the thumbnails found within the text. These audio clips will further describe the radiographical findings and/or add background information about specific cases. Therefore, keep your eye out for messages guiding you to those clips.

Click below for the first one!

At the end of this course you will not receive a Certificate of Completion on-line, but a Transcript will be mailed to you from the Continuing Education Department within the week you complete the course.


None applicable


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