![]() It primarily puts pressure on the nerves. While theoretically this can involve the nerves, vein, and artery to the arm, just like TOS, it rarely involves the vein and artery. Like TOS, there may be pain above the shoulder blade in back as well as in the neck. But in PMS there also is pain or tenderness in the chest wall below the collar bone and often in the arm pit as well. The symptoms are similar to those of TOS: Pain, weakness, numbness and tingling in the hand and arm. It often coexists with thoracic outlet syndrome (TOS) but can also occur alone. Pectoralis minor syndrome (PMS) is a condition causing pain, numbness and tingling in the hand and arm. The clot formation is due to changes in the artery as a result of a congenital extra rib, called a cervical rib or abnormal first rib. Even when a clot forms, most people do not develop symptoms until the clot breaks into small pieces which flow down the arm to block arterial circulation at the elbow or hand. These people are the ones who can develop obstruction and clots in the vein from excessive arm and shoulder activity.Īrterial TOS is caused by clot formation in the artery to the arm (subclavian artery) in the area just behind the collar bone. However, some people are born with a very narrow space through which the vein travels. Most people have adequate room for the main vein to travel from the arm to reach the heart. Pressure against the vein is due to variations in normal anatomy. Venous TOS is often caused by strenuous use of the arm which irritates the main vein to the arm (subclavian vein) lying behind the collar bone (the clavicle). ![]() This in turn puts pressure against the nerves to the arm which causes the symptoms. The injury results in over-stretching neck muscles which heal by forming scar tissue in the muscle. Neurogenic TOS is most often caused by neck trauma, whiplash injuries or repetitive stress injury at work being the most common events that bring on symptoms. The three types of TOS are very different from each other. The appropriate terms, arterial or venous, should be employed and the term vascular discarded. The term refers to TOS due either to compression of an artery or vein (arterial or venous TOS). Vascular TOS is a term sometimes used but there is no such entity as vascular TOS. Arterial TOS-compression of the main artery comprises less than 1% of all TOS patientsĤ. Venous TOS-compression of the main vein comprises 4% of all TOS patientsģ. Neurogenic TOS-nerve compression comprises 95% of all TOS patientsĢ. There are three types of TOS depending on which structure is being compressed:ġ. The cause is pressure in the neck against the nerves and blood vessels that go to the arm. Thoracic outlet syndrome (TOS) is a condition presenting with arm complaints of pain, numbness, tingling and weakness. *This condition is no longer considered rare Stay Informed With NORD’s Email Newsletter. ![]() Find a Rare Disease Patient Organization.Rare Disease Cures Accelerator (RDCA-DAP).Find Clinical Trials & Research Studies.Launching Registries & Natural History Studies.A Podcast For The Rare Disease Community.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |