Primary and secondary hypothyroidism
From DrKoop's partner site on diet and exercise, MyDietExercise.com
Hypothyroidism is a decreased activity of the thyroid gland which may affect all body functions. The rate of metabolism slows causing mental and physical sluggishness. The most severe form of hypothyroidism is myxedema, a medical emergency. Hypothyroidism can be caused by a problem with the thyroid itself (primary), or by the malfunction of the pituitary gland or hypothalamus (secondary).
Review Date: 10/25/2006  advertisement
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