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Thymus Hyperplasia: Enlargement of the thymus gland. Enlargement of the thymus not resulting from any disease process is very rare and is generally not a problem. Some cases of thymic hyperplasia are the result of cancer e.g. thymoma. It may also be associated with other conditions such as sarcoidosis or may be a response to such things as steroid administration. The thymus gland is located beneath the breastbone and above the windpipe and heart. It is made up of lymphatic tissue and is believed to be responsible for supporting the development of the immune system from the fetal stage through to puberty. After puberty, the thymus gland tends to shrink. More detailed information about the symptoms, causes, and treatments of Thymus Hyperplasia is available below.
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