Difference between revisions of "Thymus"

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130 bytes added ,  22:12, 10 December 2011
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'''Thymus''' is an annoying little organ that is in the mediastinum.
'''Thymus''' is an annoying little organ that is in the [[mediastinum]]. It is often removed in pediatric cardiac surgery 'cause it is in the way.  In adults, it is commonly removed 'cause the patient has myasthenia gravis.


=Overview=
=Overview=
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*Important for development of the immune system.
*Important for development of the immune system.
*May contain within it parathyroid.<ref name=Ref_PBoD706>{{Ref PBoD|706}}</ref>
*May contain within it parathyroid.<ref name=Ref_PBoD706>{{Ref PBoD|706}}</ref>
 
*May be absent due to genetic abnormalities, e.g. Di George syndrome.
 


==Normal histology==
==Normal histology==
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*[[Thyroid]] (ectopic).
*[[Thyroid]] (ectopic).


=Absence of the thymus=
==Di George syndrome==
*Things go wrong with the thymus... very wrong.


=Thymus and stress=
==Thymus and stress==
*Stress -> increased endogenous steroid -> lymphocyte death -> increased tingible body macrophages.<ref>{{cite journal |author=Toti P, De Felice C, Stumpo M, ''et al.'' |title=Acute thymic involution in fetuses and neonates with chorioamnionitis |journal=Hum. Pathol. |volume=31 |issue=9 |pages=1121–8 |year=2000 |month=September |pmid=11014581 |doi= |url=}}</ref>
*Stress -> increased endogenous steroid -> lymphocyte death -> increased tingible body macrophages.<ref>{{cite journal |author=Toti P, De Felice C, Stumpo M, ''et al.'' |title=Acute thymic involution in fetuses and neonates with chorioamnionitis |journal=Hum. Pathol. |volume=31 |issue=9 |pages=1121–8 |year=2000 |month=September |pmid=11014581 |doi= |url=}}</ref>


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