| 21. | The thymus contributes fewer cells as a person ages.
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| 22. | It often presents as a mediastinal mass because of involvement of the thymus.
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| 23. | They mature in, but don't originate in, the thymus.
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| 24. | The most common symptom is difficulty breathing caused by enlargement of the thymus.
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| 25. | It occurs during lymphocyte development in the thymus and bone marrow for AIRE.
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| 26. | Thymopoietin is a protein involved in the induction of CD90 in the thymus.
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| 27. | This suggested that the thymus produces substances important in the development of immunity.
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| 28. | Many pathological findings are seen in the liver, thymus and other organs.
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| 29. | The ideal tissue for this procedure is thymus tissue.
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| 30. | The young mice had all but lost their thymus glands after the pineal transplant.
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