Now the symptoms
Untreated Thyroid cancer
(or any cancer
) can lead to Metastasis which can result in a multitude of issues, a few or many, depends on where the cancer is...
Brain: Dizziness, confusion, disorientation, pain, emotional outbursts.
Bone: Pain, anemia, bleeding, pain &/or paralysis of
extremities if spine compression, pain.
Lung: From low oxygen levels there is shortness of breath, air
hunger, confusion, disorientation, anxiety, pain.