Cross Body Adduction test (also called Cross chest adduction test or scarf test) is used to check for Acromioclavicular Joint pathology.
How it’s Performed?
With the patient sitting or standing, the 90° abducted arm on the affected side is forcibly adducted across the chest toward the normal side
What does a positive Cross Body Adduction Test mean?
Pain in the acromioclavicular joint suggests Acromioclavicular joint pathology, anterior impingement, or suprascapular nerve entrapment syndrome. (Absence of pain after injection of an anesthetic is a sign of joint disease.)
Dull, deep-seated pain over the superior scapular margin in the supraspinous fossa and posterolaterally on the scapula with radiation into the upper arm can be an indication of compression of the suprascapular nerve under the transverse scapular ligament by distal displacement of the scapula.
Sensitivity & Specificity
A study1by Efstathios Chronopoulos for diagnostic value of physical tests for isolated chronic acromioclavicular lesions, he compared the three tests (acromioclavicular resisted extension test, active compression test and Cross Body Adduction Test) that is used in evaluation of acromioclavicular joint.
The accuracy of Cross Body Adduction Test was as following:
Sensitivity: 77 %
Specificity: 79 %.
The study concludes that these tests have utility in evaluating patients with acromioclavicular joint pathologic lesions, and a combination of these physical tests is more helpful than isolated tests.
Acromioclavicular (AC) joint is a plane/gliding joint with a fibrocartilaginous disc.
When the arm is maximally elevated, about 5 to 8 degrees of rotation is possible at the AC joint, although the clavicle rotates approximately 40 to 50 degrees
Efstathios Chronopoulos, Tae Kyun Kim, Hyung Bin Park, Diane Ashenbrenner, Edward G McFarland.Diagnostic value of physical tests for isolated chronic acromioclavicular lesions. Am J Sports Med . Apr-May 2004;32(3):655-61. doi: 10.1177/0363546503261723.PMID: 15090381
Clinical Tests for the Musculoskeletal System, Third Edition