Friday, November 14, 2008

Iliotibial Band Friction Syndrome (or Not)

Running is a great way to get exercise, if your ankles and knees will tolerate it:

Photo by ziga-zaga
Runners can develop a condition called, iliotibial band friction syndrome, as can cyclists. In this condition, there is inflammation of the tissues around the iliotibial band (ITB). Patients present with lateral knee pain. On MRI, one can see edema around the iliotibial band, typically deep to the iliotibial band (arrows), as in this example:

Recently, I ran across a case of a young female patient with knee pain, with edema around the iliotibial band:

Although the edema is closely associated with the ITB, the preponderance of edema is superficial to the ITB, rather than deep to it, as would be expected for ITB friction syndrome.

This seemed a bit odd, so I picked up the phone and called the patient. She informed me that she had received a cortisone shot in this location about 3 hours prior to the MRI, and had a bruise in that location. A little clinical history can go a long way...

Thus, if you see edema concentrated in a focal area in the superficial soft tissues, without a history of trauma or infection, consider the possibilty of iatrogenic mischief. This is also true for other joints, such as the shoulder.



Vic David MD
Orthoradiology.com


1 comment:

Mark D. Herbst, M.D., Ph.D. said...

I often see edema superficial to the ITB that I call sprain, similar in appearance the edema seen along the superficial surface of the MCL and the LCL that also represents sprain. Nice case here following an injection. If the edema is deep to the ITB, I call it friction syndrome.