Employers Covered Under the HCSO. An Employer is covered under the HCSO if it: 1  Is a for-profit business with 20 or more employees, or a non-profit business with 50 or more employees; and. 2  Has employees who work in San Francisco.
(November 2009). Thoracic outlet syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on a neurovascular bundle passing between the anterior scalene and middle scalene muscles.horacic outlet syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on a neurovascular bundle passing between the anterior scalene and middle scalene muscles.
Thoracic outlet syndrome (TOS) is a condition whereby symptoms are produced (such as numbness in fingers, pain in shoulder, arm, and neck) by compression of nerves and/or blood vessels in the upper chest. Thoracic outlet syndrome is a condition whereby symptoms are produced from compression of nerves or blood vessels, or both, because of an inadequate passageway through an area (thoracic outlet) between the base of the neck and the armpit. 2  Thoracic outlet syndrome symptoms include. 3  neck pain, 4  shoulder pain,