Which condition is a neuritis of the brachial plexus and can be associated with Erb's palsy?

Which condition is a neuritis of the brachial plexus and can be associated with Erb's palsy?

• A. Parsonage-Turner syndrome
• B. Carpal tunnel syndrome
• C. Rotator cuff tear
• D. Adhesive capsulitis

Answer: (A)

Parsonage-Turner syndrome is an inflammatory neuritis of the brachial plexus that often presents with abrupt shoulder pain followed by weakness, typically affecting muscles supplied by the C5-C6 nerves. Because it targets the brachial plexus, its pattern can resemble Erb's palsy, with upper arm weakness and limited shoulder movement, especially after a preceding viral illness or vaccination. This differentiates it from a traumatic nerve injury, since the presentation is inflammatory rather than due to traction or rupture. Understanding this helps distinguish it from other shoulder problems. A carpal tunnel syndrome is a distal nerve entrapment of the median nerve at the wrist, not a brachial plexus neuritis. A rotator cuff tear is a tendon injury causing pain and weakness without a primary nerve inflammation pattern. Adhesive capsulitis (frozen shoulder) involves joint capsule stiffness and pain with progressive loss of motion, not nerve inflammation. Parsonage-Turner is typically self-limited and managed with rest, physical therapy, and sometimes electrodiagnostic studies to confirm neuritis and assess recovery.

Parsonage-Turner syndrome is an inflammatory neuritis of the brachial plexus that often presents with abrupt shoulder pain followed by weakness, typically affecting muscles supplied by the C5-C6 nerves. Because it targets the brachial plexus, its pattern can resemble Erb's palsy, with upper arm weakness and limited shoulder movement, especially after a preceding viral illness or vaccination. This differentiates it from a traumatic nerve injury, since the presentation is inflammatory rather than due to traction or rupture.

Understanding this helps distinguish it from other shoulder problems. A carpal tunnel syndrome is a distal nerve entrapment of the median nerve at the wrist, not a brachial plexus neuritis. A rotator cuff tear is a tendon injury causing pain and weakness without a primary nerve inflammation pattern. Adhesive capsulitis (frozen shoulder) involves joint capsule stiffness and pain with progressive loss of motion, not nerve inflammation. Parsonage-Turner is typically self-limited and managed with rest, physical therapy, and sometimes electrodiagnostic studies to confirm neuritis and assess recovery.