A 74-year-old man developed multiple lung metastases from a typical type A thymoma 9 years after initial detection, remaining stable without adjuvant therapy for 2 years post-resection.
Case Report (n=1)
No
This case highlights the potential for distant metastasis in patients with otherwise indolent, typical type A thymomas, emphasizing the need for long-term surveillance of at least 10 years.
Abstract Background Typical type A thymomas are slow-growing tumors generally associated with a favorable clinical course, and distant metastasis is exceedingly rare. Case presentation We report a case of multiple lung metastases from a typical type A thymoma in a 74-year-old man, identified 9 years after the initial detection of an anterior mediastinal nodule. The patient underwent simultaneous thymectomy and wedge resection of the pulmonary nodule. Histopathological examination confirmed a diagnosis of typical type A thymoma with pulmonary metastases. Postoperatively, the patient was also diagnosed with prostate cancer as a secondary malignancy. At 2-year follow-up, without any postoperative treatment, there was no evidence of progression or development of new pulmonary lesions. Conclusion This case underscores the potential for distant metastasis in patients with otherwise indolent, typical type A thymomas, highlighting the need for long-term surveillance.
Tobari et al. (2026) conducted a case report in Typical type A thymoma with multiple lung metastases (n=1). Simultaneous thymectomy and wedge resection was evaluated. A 74-year-old man developed multiple lung metastases from a typical type A thymoma 9 years after initial detection, remaining stable without adjuvant therapy for 2 years post-resection.