top of page


Author: Masaharu Tsubokura M.D., PhD.

Editor: Yudai Kaneda

315  The 10-year survival rate is 98% if the disease has not progressed.

February 20, 2021

The thyroid gland is a small butterfly-shaped organ, about 10-20 grams, slightly below the middle of the neck (below the throat). A malignant form of cancer that causes a lump to form in a part of the thyroid gland is called thyroid cancer. Thyroid cancers are classified into several types according to their microscopic appearance, but most radiation-related thyroid cancers are of a type called papillary carcinoma.

Generally, in medical care, one of the methods used to indicate the malignancy of cancer is the "5-year survival rate" index, which refers to the percentage of patients diagnosed with cancer who are still alive 5 years after the diagnosis. You may feel that this is a rather blunt indicator.