Parsonage-Turner Syndrome, also known as idiopathic brachial plexopathy or amyotrophic neuralgia, is a rare condition characterized by sudden, severe shoulder pain followed by progressive neurological deficits. This case report aims to highlight an atypical presentation of Parsonage-Turner Syndrome involving the radial nerve exclusively. A 61-year-old right-handed male presented with non-traumatic right shoulder pain evolving over 7 months, followed by paresthesias and sudden loss of wrist and finger extension strength. Electrodiagnostic studies showed recent partial axonal (motor and sensory) injury of the right radial nerve. He was diagnosed with Parsonage-Turner Syndrome based on clinical history and electrophysiological findings and commenced rehabilitation. After two months of rehabilitation, there was significant improvement in wrist and finger extensor strength and hand functionality. This case underscores the importance of considering Parsonage-Turner Syndrome in patients with unexplained upper limb weakness and the necessity of a multidisciplinary approach in managing this condition.
Carvalho et al. (Tue,) studied this question.