Thoracic outlet syndrome of pectoralis minor etiology mimicking cardiac symptoms on activity: a case report
2012
Thoracic outlet syndrome is the result of compression or irritation of neurovascular bundles as they pass from the lower cervical spine into the arm, via the axilla. If the pectoralis minor muscle is involved the patient may present with chest pain, along with pain and paraesthesia into the arm. These symptoms are also commonly seen in patients with chest pain of a cardiac origin. In this case, a patient presents with a history of left sided chest pain with pain and paraesthesia into the left upper limb, which only occurs whilst running. The symptoms were reproduced on both digital pressure over the pectoralis minor muscle and on provocative testing for thoracic outlet syndrome. The patient’s treatment therefore focused on the pectoralis minor muscle, with a complete resolution of symptoms. This illustrates that not all cases of chest pain with associated arm symptoms that occur on physical activity are of cardiac origin.
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