Thymic epithelial tumors (TETs) are considered orphan neoplasms, and treatment options for recurrent or metastatic stages are limited. Here, we have reported a case of recurrent TET that showed complete remission after receiving high-dose corticosteroids followed by low-dose corticosteroids and cyclosporine. No recurrence was observed for the next 2 years. The effects of corticosteroids on the TET and the associated pure red cell aplasia led to adjustment of the diagnosis from thymic carcinoma to thymoma. Low-dose corticosteroids and cyclosporine might be the reason for remission maintenance.
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