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Thoracic outlet syndrome9/9/2023 ![]() It also can affect the vertebral artery, case in which it could produce transient blindness, and embolic cerebral infarction. Tingling can also be present.Ĭerebrovascular arterial insufficiency when they affect the subclavian artery. Weakness of the hand and arm muscles is also common. Decoloration of the hands is also a possible symptom, and one hand colder than the other hand is also common. Pain can also be in the side of the neck, the pectoral area below the clavicle, the axillary area, and the upper back, as in the trapezius and rhomboid area. It can involve the inner aspect of the forearm and upper arm. Pain can involve only part of the hand, as in the 4th and 5th finger only, or all of the hand. Pain in the arms and hands is almost always present. TOS affects mainly the upper limbs, especially the arms and hands. The compression may be positional (caused by movement of the clavicle (collarbone) and shoulder girdle on arm movement) or static (caused by abnormalities or enlargement of the various muscles surrounding the arteries, veins, and brachial plexus). It can affect the brachial plexus (nerves that pass into the arms from the neck), and/or the subclavian artery or vein (blood vessels that pass between the chest and upper extremity). Thoracic outlet syndrome (TOS) is a syndrome involving compression at the superior thoracic outlet involving compression of a neurovascular bundle passing between the anterior scalene and middle scalene.
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