Enlarged thyroid glands (ie, goiters) extend in the chest posterior to the sternum, making the gland a substernal (or retrosternal) goiter. This increases in size causing pressure on the breathing tube causing respiratory embarrassment. This needs surgery and can be done by open, VATS or Robotic techniques.
Sometimes, parathyroid glands enlarge to form a tumour behind the chest. This is known as an ectopic parathyroid.
Removal of this is required and can be done by open, VATS or Robotic Surgery