Parsonage-Turner syndrome (PTS), also known as acute brachial neuropathy or neuralgic amyotrophy, is a medical condition that has puzzled medical professionals for years. Previously referred to as idiopathic brachial plexopathy, which highlights the unknown cause of the condition, PTS lacks a clear explanation for why it develops in certain individuals while the majority of the population remains unaffected, despite experiencing similar risk factors. It is estimated that approximately 1.6 cases of PTS are diagnosed per 100,000 people each year.
Etiology
Parsonage-Turner syndrome (PTS) is a unique and uncommon condition that is believed to be caused by autoimmune inflammation of the brachial plexus. The brachial plexus is a network of nerves that transmit impulses to the arms, shoulders, and chest. When this inflammation occurs, it can impact the scapulothoracic nerve in the upper arm and shoulder, resulting in a condition known as scapular winging. Scapular winging refers to the abnormal position of the shoulder blade, where it extends from the back. This abnormal positioning can cause difficulties in lifting, pulling, and performing basic day-to-day actions.
Recognizing Initial Symptoms of Parsonage-Turner Syndrome
One of the primary indications of Parsonage-Turner syndrome is the abrupt onset of intense and persistent pain in the shoulder girdle, affecting only one side of the body. This excruciating pain can radiate down the arm, forearm, and even into the hand. Typically, the discomfort worsens during nighttime and often disrupts sleep. While the pain typically lasts for a duration of one to two weeks, it is not uncommon for it to persist for a longer period. Although sensory deficits occasionally accompany this symptom, it is a rare occurrence.