DISCUSSION
Ectopic thymic tissue is a rare clinical entity that can occur in the neck, lung, pleura or another location in the thoracic cavity.78 Bilateral cervical ectopic thymus has also been reported.13 From our systematic review, 192 paediatric cases were identified with 150 with sufficient data to be analysed in the last 20 years. We will discuss the challenges regarding both the diagnosis and management of ECT based of the current available evidence.