Thyroid Cancers

Posted by e-Medical PPT
Thyroid cancers can be classified according to their histopathological characteristics.The following variants can be distinguished
* Papillary thyroid cancer (75% to 85% of cases - often in young females - excellent prognosis
* Follicular thyroid cancer (10% to 20% of cases)
* Medullary thyroid cancer (5% to 8% of cases)- Cancer of the parafollicular cells, part of MEN-2.
* Anaplastic thyroid cancer (Less than 5%). It is not responsive to treatment and can cause pressure symptoms.
* Others
o Lymphoma
o Squamous cell carcinoma, sarcoma
The follicular and papillary types together can be classified as "differentiated thyroid cancer".These types have a more favorable prognosis than the medullary and undifferentiated types.
Most often the first symptom of thyroid cancer is a nodule in the thyroid region of the neck.However, many adults have small nodules in their thyroids, but typically under 5% of these nodules are found to be malignant. Sometimes the first sign is an enlarged lymph node. Later symptoms that can be present are pain in the anterior region of the neck and changes in voice.Thyroid cancer is usually found in a euthyroid patient, but symptoms of hyperthyroidism or hypothyroidism may be associated with a large or metastatic well-differentiated tumor.

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