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name: Goiter 
also known as: Enlarged Thyroid; Thyroid Enlargement; Goitre; Thyroid Disease; Simple Goiter; Nodular Goiter 
also see: Euthyroid Goiter; Hyperthyroidism; Hypothyroidism; Thyroid Nodule; Thyroid Cancer; ICD 
description: There are three types of enlarged thyroid glands, also called a goiter:
1. Euthyroid goiter which is enlargement despite a normal functioning thyroid gland.
2. Hypothyroid goiter which can occur with an under-functioning thyroid gland.
3. Hyperthyroid goiter which can occur with an over-active thyroid gland, such as Grave's disease.

Causes of euthyroid goiter and hypothyroid goiter are similar and can include thyroid stimulating hormone such as from a pituitary tumor, thyroiditis, sarcoidosis, amyloidosis, iodine deficiency, excessive consumption of certain foods such as cabbage, turnips, brussel sprouts, maize, bamboo, lima beans, sweet potato, soybean, certain drugs such as sulfonamides, antithyroid drugs such as propylthiouracil, thiocyanate and perchlorate, iodides, lithium.

Causes of hyperthyroid goiter include hyperthyroidism including Grave's disease, Hashimoto's thyroiditis, and pituitary tumor
diagnosis: Differential diagnosis includes Grave's disease, thyroiditis, thyroid nodule. See thyroid profile

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Last updated 7/4/2009

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