*Upper Extremity Entrapment Neuropathy DOI: http://dx.doi.org/10.5772/intechopen.98279*

**Clinical features:** The patient has poorly localized lateral and posterior shoulder pain and weakness, which is exacerbated by abduction and external rotation of the arm. Generally, pain becomes evident at night, after overhead activities and in the late phase of throwing. In a non dermatomal distribution, paresthesias of the affected arm may be seen. Minimal axillary nerve sensory defect can be detected [8, 26, 30, 31]. QSS is difficult to diagnose because it shows similar characteristics to the symptoms of rotator cuff pathology or other shoulder joint-related abnormalities [8].
