This topic was posted by Dr Sridhar of IMA CGP WhatsApp journal

Winging of scapula (rt side).

Causes: Most commonly due to injury to Long Thoracic nerve leading to Serratus Anterior Palsy.
Other possibility is due to paralysis of Trapezius or Rhomboid muscles which is rare.
such condition can occur due to Trauma like Sports injury, Iatrogenic due to Mastectomy with axillary Lymphnode dissection, management of pneumothorax , Electric shock etc.

Very rarely Genetic disorder like Facioscapulohumeral dystrophy can lead to this.
Mainly Flexion n Abduction of shoulder is affected, Making Activities like Combing hair, wearing clothes, Lift, Push or Pull weighty objects difficult.

Treatment: is Mainly Physiotherapy. Rarely in prolonged palsies Surgery is indicated.