neurologic disorders
Thoracic Outlet Compression Syndromes (TOS)
Symptoms and Signs of TOS
Pain and paresthesias usually begin in the neck or shoulder and extend to the medial aspect of the arm and hand and sometimes to the adjacent anterior chest wall. Many patients have mild to moderate sensory impairment in the C8 to T1 distribution on the painful side; a few have prominent vascular-autonomic changes in the hand (eg, cyanosis, swelling). In even fewer, the entire affected hand is weak. Rare complications of thoracic outlet compression syndromes include Raynaud Syndrome localized to the affected arm and distal gangrene. 