Image DDX
Mobile NEW!
Videocasts NEW!

Case of the Week 321

What's the most likely diagnosis?

  • 81 year-old man with bowed legs

Frontal and lateral views of the left femur

  1. Ewing's sarcoma
  2. Rheumatoid arthritis
  3. Multiple myeloma
  4. Paget's disease
  5. Fibrous dysplasia

Additional Image - None


Additional Image


No additional images


4. Paget's Disease

More (Click Discussion Tab)

Paget's Disease of the Femur

General Considerations

  • Femur is one of the bones most commonly involved by Paget’s disease
    • Pelvis is most common
  • There is accelerated bone turnover in Paget’s at active sites resulting in bones that have
    • Coarsened trabeculae
    • Thickened cortices, and
    • Are mechanically inferior to normal bones
  • Bone softening leads not only to bowing of long bones, but also

More ...

This Week

81 year-old with bowed legs
Part 2 of a 2 part test yourself video podcast on pulmonary differential diagnoses; get it free at the iTunes Store


Subscribe to video podcasts from and be notified when new mini-tutorials designed especially for the small screen become available NOTE:The feed address changed on 8/9/08
A mobile version for your PDA or internet-enabled smartphone with lists of differential diagnoses, most commons and more
How to recognize the most common fractures and dislocations
The top diagnostic images that all medical students should know according to the Alliance of Medical Student Educators in Radiology
A list of the most common differential diagnoses in chest imaging
A PowerPoint lecture focusing on stroke
An approach to bowel gas patterns, soft tissue masses and abdominal calcifications is an award-winning educational site aimed primarily at medical students and radiology residents-in-training, containing  lectures, handouts, images, Cases of the Week, archives of case quizzes, flashcards of differential diagnoses and “most commons” lists, primarily in the areas of chest, GI, cardiac, and bone radiology.