Before revision: Iliotibial band syndrome 156x156px|Diagram indicating the location of the iliotibial band and pain associated with iliotibial band syndrome Iliotibial band syndrome (ITBS) is defined as inflammation of the iliotibial band on the outside of the knee.
After revision: Iliotibial band syndrome Iliotibial band syndrome (ITBS) is defined as inflammation of the iliotibial band on the outside of the knee.