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ORPHA:99867Disease
What it is
Thymoma is a thymic epithelial neoplasm (TEN), a rare malignancy that arises from the epithelium of the thymic gland.
Key facts
- Prevalence
- 1-9 / 100 000 (lifetime, Europe)
- Age of onset
- Adult
- Inheritance
- Not applicable
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
Signs and symptoms
Sometimes5–29%
12- Abnormal mediastinum morphology
- Acetylcholine receptor antibody positivity
- Autoimmunity
- Cough
- Decreased circulating antibody level
- Dyspnea
- Fever
- Hoarse voice
and 4 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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