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Updated: Aug 5, 2026

Computer-Aided Three-Dimensional Visualization in the Treatment of Locally Advanced Thyroid Cancer
Published on: June 9, 2023
[Thyroid squamous-cell carcinoma showing thymus-like element (CASTLE): a report of eight cases]
Objective:
To report 8 cases of squamous-cell carcinoma showing thymus-like element (CASTLE) of the thyroid.
Methods:
Clinical data and pathological sections were retrospectively reviewed.
Results:
CASTLE of the thyroid differed from ordinary squamous-cell carcinoma (SCC) in that it not only presented typical squamous pattern of differentiation, but also admixed with thymic architecture, such as Hassall's corpuscles, lymphoepithelial-like structure and mature lymphocyte infiltration in the stroma. CASTLE of the thyroid and much better prognosis than that of the ordinary SCC of the thyroid with a median survival time of 10.5 year. Histogenesis of CASTLE was discussed.
Conclusion:
Thyroid CASTLE is of rare occurrence. It should be distinguished from SCC of thyroid in order to treat such patients adequately.
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