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Can be due to trauma or be more degenerative
Can be caused by acute injuries related to falls on an outstretched arm or to pulling on the shoulder
Can also be related to chronic repetitive injuries with overhead movement and lifting
Partial tears are one of the most common reasons for impingement syndrome
Full thickness rotator cuff tears are usually more symptomatic and may require surgical treatment
The most commonly torn tendon is the supraspinatus
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Difficulty lifting the arm with limited active range of motion
Weakness with resisted strength testing suggests full thickness tears
Night pain is also a common complaint
The affected patient usually also has positive Neer and Hawkins impingement tests usually positive
See Table 41–1
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