Symptoms caused by the growing tumour
In many cases the tumour remains small and does not cause pressure symptoms. However, in some cases the tumour grows enough to cause pressure on the nearby tissues. This can lead to:
- Headaches.
- Problems with vision. The tumour may press on the optic nerves (the nerves going from the eyes to the brain) which are just next to the pituitary.
- Other normal cells in the pituitary may become squashed and damaged. Therefore, you may develop a lack of other hormones that are made by the pituitary. This can cause an underactive thyroid gland and/or an underactive adrenal gland which can cause various other symptoms.
Other symptoms in children
If you have too much growth hormone before you finish growing then you get a condition called gigantism. In this condition you grow very tall.


