Distal Osteoarthritis

The strain index has not been developed to predict increased risk for distal upper-extremity disorders to uncertain etiology or relationship to work. Examples include ganglion cysts, osteoarthritis, avascular necrosis of carpal bones, and ulnar nerve entrapment at the elbow. 

Patients with distal iliotibial band tendinopathy present with local pain and tenderness over the preinsertional portion of the band, in a more distal location than the site of iliotibial band friction syndrome. These lesions usually occur in middle-aged subjects who have undergone previous placement of a knee prosthesis or are affected by knee osteoarthritis. In the former case, the deep boundary... 

Fig. 14.77a,b. Distal iliotibial band tendinitis in a patient with knee osteoarthritis, a Coronal 12-5 MHz US image obtained over the lateral knee reveals a swollen and hypoechoic preinsertional portion (white arrowheads) of the iliotibial band. The proximal part of the band retains a normal echotexture (open arrowhead), b Contralateral side showing a normal-appearing band (open arrowheads)... 

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