MeSH Browser

MeSH Heading: Thymus Hyperplasia
Tree Number(s): C15.604.816
Unique ID: D013952
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D013952
Scope Note: Enlargement of the thymus. A condition described in the late 1940's and 1950's as pathological thymic hypertrophy was status thymolymphaticus and was treated with radiotherapy. Unnecessary removal of the thymus was also practiced. It later became apparent that the thymus undergoes normal physiological hypertrophy, reaching a maximum at puberty and involuting thereafter. The concept of status thymolymphaticus has been abandoned. Thymus hyperplasia is present in two thirds of all patients with myasthenia gravis. (From Segen, Dictionary of Modern Medicine, 1992; Cecil Textbook of Medicine, 19th ed, p1486)
Entry Term(s): Hyperplasia of Thymus Gland; Thymic Hyperplasia
NLM Classification #: WK 400
See Also: Myasthenia Gravis
Date Established: 1966/01/01
Date of Entry: 1999/01/01
Revision Date: 2010/06/25

Allowable Qualifiers: blood (BL)

cerebrospinal fluid (CF)

chemically induced (CI)

classification (CL)

complications (CO)

congenital (CN)

diagnosis (DI)

diagnostic imaging (DG)

diet therapy (DH)

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economics (EC)

embryology (EM)

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prevention & control (PC)

psychology (PX)

radiotherapy (RT)

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surgery (SU)

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urine (UR)

veterinary (VE)

virology (VI)

Concept UI: M0021470
Scope Note: Enlargement of the thymus. A condition described in the late 1940's and 1950's as pathological thymic hypertrophy was status thymolymphaticus and was treated with radiotherapy. Unnecessary removal of the thymus was also practiced. It later became apparent that the thymus undergoes normal physiological hypertrophy, reaching a maximum at puberty and involuting thereafter. The concept of status thymolymphaticus has been abandoned. Thymus hyperplasia is present in two thirds of all patients with myasthenia gravis. (From Segen, Dictionary of Modern Medicine, 1992; Cecil Textbook of Medicine, 19th ed, p1486)
Terms: Thymus Hyperplasia Preferred Term
Term UI T040921
Date01/01/1999
LexicalTag NON
ThesaurusID NLM (1966); Hyperplasia of Thymus Gland
Term UI T768975
Date04/08/2010
LexicalTag NON
ThesaurusID; Thymic Hyperplasia
Term UI T768974
Date04/08/2010
LexicalTag NON
ThesaurusID

Thymus Hyperplasia MeSH Descriptor Data 2025