|ECR 2018 / C-0811|
|Thymus and ectopic thymus image findings: an important cause of pitfalls in the paediatric age.|
The thymus is an organ displayed in the paediatric population that can lead to errors when it is in an ectopic location, leading to misinterpretation of the images obtained.
In the embryo, each lobe of the thymus can leave remains in its migration route from the pharynx to the mediastinum. The ectopic thymic tissue may be cystic or solid. Knowing the existence of this pathology matters for the differential diagnosis with other cervical cystic masses, such as lymphatic malformations ("lymphangiomas"), neoplasias or vascular malformations, branchial cysts, eccentric and parathyroid thyroglossal cysts. It should also be differentiated from other solid masses, such as lymphoproliferative or infectious lymphoproliferative diseases and solid tumors, such as teratomas, lipomas, lipoblastomas, cervical neuroblastomas and rhabdomyosarcomas. Surgery is indicated for the complete removal of thymic remnants as it is often feasible and curative.