The incidence of obstetric brachial plexus injury (OBPI) is approximately 1 per 1 000 live births. Without intervention, around 25% of patients are left with permanent disability [1]. The shoulder is the most commonly affected joint and, owing to the subsequent imbalance of musculature, the abnormal deforming forces cause dysplasia of the glenohumeral joint [2]. In the growing child, this presents with a changing pattern of pathology, which requires a multidisciplinary approach and a broad range of treatment modalities to optimize function.