A 9-year-old boy develops right shoulder pain and a notable physical sign after a respiratory infection. Explore the neurological cause of this presentation.
This 9-year-old boy presented with a two-day history of right shoulder pain after an upper respiratory tract infection. What is the cause of the abnormality demonstrated?
What is the most likely diagnosis?
Brachial plexus neuritis, Palsy of the long thoracic nerve, Pediatrics, Serratus anterior, Winged scapula
