There are three general types of thoracic outlet syndrome:  Neurogenic (neurologic) thoracic outlet syndrome. This most common type of thoracic outlet syndrome is characterized by compression of the brachial plexus. The brachial plexus is a network of nerves that come from your spinal cord and control muscle movements and sensation in your shoulder, arm and hand. Venous thoracic outlet syndrome. This type of thoracic outlet syndrome occurs when one or more of the veins under the collarbone (clavicle) are compressed, resulting in blood clots. Arterial thoracic outlet syndrome. This is the least common type of TOS. It occurs when one of the arteries under the collarbone is compressed, resulting in bulging of the artery, also known as an aneurysm.  It's possible to have a mix of the three different types of thoracic outlet syndrome, with multiple parts of the thoracic outlet being compressed. Thoracic outlet syndrome symptoms can vary depending on the type. When nerves are compressed, signs and symptoms of neurogenic thoracic outlet syndrome include:  Numbness or tingling in your arm or fingers Pain or aches in your neck, shoulder, arm or hand Weakening grip  Signs and symptoms of venous thoracic outlet syndrome can include:  Discoloration of your hand (bluish color) Arm pain and swelling Blood clot in veins in the upper area of your body Arm fatigue with activity Paleness or abnormal color in one or more fingers or your hand Throbbing lump near your collarbone  Signs and symptoms of arterial thoracic outlet syndrome can include:  Cold fingers, hands or arms Hand and arm pain Lack of color (pallor) or bluish discoloration (cyanosis) in one or more of your fingers or your entire hand Weak or no pulse in the affected arm 
general types thoracic outlet syndrome:  neurogenic (neurologic) thoracic outlet syndrome  common type thoracic outlet syndrome characterized compression brachial plexus  brachial plexus network nerves come spinal cord control muscle movements sensation shoulder  arm hand  venous thoracic outlet syndrome  type thoracic outlet syndrome occurs veins collarbone (clavicle) compressed  resulting blood clots  arterial thoracic outlet syndrome  least common type tos  occurs arteries collarbone compressed  resulting bulging artery  known aneurysm   it's possible mix types thoracic outlet syndrome  multiple parts thoracic outlet being compressed  thoracic outlet syndrome symptoms can vary depending type  nerves compressed  signs symptoms neurogenic thoracic outlet syndrome include:  numbness tingling arm fingers pain aches neck  shoulder  arm hand weakening grip  signs symptoms venous thoracic outlet syndrome can include:  discoloration hand (bluish color) arm pain swelling blood clot veins upper area body arm fatigue activity paleness abnormal color fingers hand throbbing lump near collarbone  signs symptoms arterial thoracic outlet syndrome can include:  cold fingers  hands arms hand arm pain lack color (pallor) bluish discoloration (cyanosis) fingers entire hand weak pulse affected arm 
thoracic outlet syndrome