At the onset of the disease, thyroid cancer usually does not cause any signs or symptoms. It can then be discovered “by chance” during a palpation of the neck or a cervical ultrasound performed for another cause.

It can also be discovered when monitoring a goiter or a benign nodule.

As it progresses, one or more of the following symptoms may appear, but in the vast majority of cases they are related to benign thyroid abnormalities (95% of thyroid masses are benign nodules) or to other more common pathologies:

• More or less painful discomfort in the neck or throat;
• Mass palpable or visible at the front of the neck or on the sides and then corresponding to lymphadenopathy (enlarged lymph nodes;
• Change in voice, which becomes more hoarse;
• Difficulty swallowing or breathing;
• More or less painful discomfort in the neck or throat;
• Change in a known nodule or goiter.