Learning objectives
Present the imaging findings of thymic pathology on PET-CT
Explain the added value of using PET-CT when evaluating thymic lesions
Discuss advantages and limitations of this technique,
and how it can complement CT and MRI
Background
Thymic lesions are being diagnosed more frequently as imaging tests have become readily available.
Most thymic lesions are asymptomatic,
so incidental findings are frequent.
PET-CT is used as part of most oncologic procedures planning,
and there are specific aspects of this technique that are important to be known by radiologists regarding this kind of lesions.
Findings and procedure details
We have selected cases that enlighten the most important aspects of PET-CT thymus imaging and how it can contribute to anaccurate diagnosis or for treatment planning.
Specifically,
we present an overview of common thymic lesions and mimics of disease,
with an emphasis on PET-CT imaging findings,
while also briefly commentingCT and MRI findings.
Cases presented includenormal thymus,
thymic hyperplasia,thymic cyst,
invasive thymoma,
thymic carcinoma,
and lymphoma.
Normal appearance of thymus and variation with age
The normal thymus is a triangular,
bilobed organ residing in the...
Conclusion
It is important for radiologists to be aware of the many appearances of thymic pathology,
and how to accurately approach those that need to be treated.
PET-CT is an important contributor to a proper diagnosis.
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