Papillary carcinoma of the thyroid
Definition:
A malignancy of the thyroid gland.
Causes, incidence, and risk factors:
The cause is unknown, but radiation may be a contributing factor. Thyroid function tests are usually normal. Risk factors are radiation therapy to the head or neck and being over 40. The incidence is higher among women.
Other types of thyroid cancer are anaplastic carcinoma of the thyroid, follicular tumor of the thyroid, medullary carcinoma of thyroid, thyroid lymphoma, and metastatic thyroid cancer. The incidence is 1 out of 1,000 people. Papillary carcinoma is rare in children. More than 90% of pediatric-age thyroid cancers are well-differentiated follicular carcinomas.
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