Thyroid cancer. Light micrograph of a section through a thyroid gland with adenocarcinoma. Adenocarcinomas are cancers that arise from glandular tissue. The cause of thyroid cancer is not known. It is more common in women than men. Symptoms can include swelling in the neck and difficulty swallowing or breathing. Treatment is with the surgical removal of the tumour or gland, often combined with radioactive iodine therapy.
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