All are seen in Thoracic outlet syndrome except ?
**Core Concept**
Thoracic outlet syndrome (TOS) is a condition characterized by compression of the nerves and/or blood vessels (arteries and veins) in the thoracic outlet, which is the space between the collarbone (clavicle) and the first rib. This compression can lead to pain and other symptoms in the neck, shoulder, and arm.
**Why the Correct Answer is Right**
The symptoms of TOS can be attributed to the compression of the brachial plexus, a group of nerves that originate in the spinal cord and travel down the arm. The brachial plexus is responsible for controlling the muscles of the shoulder and arm, as well as providing sensation to the arm and hand. Compression of the brachial plexus can lead to pain, numbness, and tingling in the arm, as well as weakness in the muscles of the arm and hand.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because TOS can indeed cause pain in the neck and shoulder region, which is a common symptom of the condition.
**Option B:** This option is incorrect because TOS can cause weakness in the muscles of the arm and hand, which is a result of compression of the brachial plexus.
**Option C:** This option is incorrect because TOS can indeed cause numbness and tingling in the arm, which is a result of compression of the nerves in the thoracic outlet.
**Clinical Pearl / High-Yield Fact**
A key characteristic of TOS is that the symptoms are often worsened by activities that involve raising the arm above the head, such as lifting or throwing.
**Correct Answer: D.**