Immune Theory
Parsonage-Turner syndrome (PTS) is often associated with certain risk factors, with the most common being a recent viral illness. In fact, nearly a quarter of individuals diagnosed with PTS report experiencing a viral illness just before the onset of symptoms. Another significant risk factor is immunization. Researchers have put forth a theory suggesting that PTS may develop as a result of the immune response triggered by specific viral illnesses or the viral antigen present in vaccinations. Interestingly, these researchers attribute the immune response itself rather than the virus or the immunization as the primary culprit, as the immune system tends to respond in a similar manner regardless of whether the disease or a preventive immunization triggers it.
Diagnosing Parsonage-Turner Syndrome
When it comes to diagnosing Parsonage-Turner syndrome (PTS), doctors primarily rely on clinical observation. However, it is important to note that incorrect diagnoses are quite common, especially when the primary identifying symptom of experiencing constant pain for a week or more is absent. In such cases, medical professionals are trained to consider PTS as a possibility if the patient complains of any type of shoulder girdle pain.
In addition to clinical observation, there are several diagnostic tests that can provide further information. Magnetic resonance imaging (MRI) scans can offer valuable insights, and electromyograms (EMG) as well as nerve conduction studies (NCS) can help deliver a definitive diagnosis.