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Simultaneous Resection for Type A Thymoma With Synchronous Solitary Pulmonary Metastasis: A Case Report.
Takamitsu Hayakawa1, Mikako Mitake1, Hirohisa Inaba1
1Department of Thoracic Surgery Japanese Red Cross Shizuoka Hospital Shizuoka Japan.
Respirology Case Reports
|February 20, 2026
Summary
Metastatic type A thymoma is rare but can occur. Simultaneous resection of primary and solitary pulmonary metastatic thymoma may lead to favorable outcomes, as seen in this case report.
Area of Science:
- Thoracic Surgery
- Oncology
- Pathology
Background:
- Type A thymoma typically has an excellent prognosis with rare distant metastasis.
- Optimal management for metastatic type A thymoma remains poorly defined.
Purpose of the Study:
- To report a case of conventional type A thymoma with solitary pulmonary metastasis.
- To discuss the management and outcomes of simultaneous resection for this rare presentation.
Main Methods:
- A case of an 81-year-old woman with synchronous anterior mediastinal and pulmonary nodules.
- Resection of both lesions via video-assisted thoracoscopic surgery (VATS).
- Histopathological and immunohistochemical analysis to confirm tumor type and metastasis.
Main Results:
- Both nodules were confirmed as conventional type A thymoma with identical histopathology.
- The patient was diagnosed with stage IVb (pT1aN0M1b) thymoma.
- The patient remained recurrence-free one year post-surgery without adjuvant therapy.
Conclusions:
- Pulmonary metastasis can occur in low-grade type A thymoma.
- Simultaneous resection may be a viable option for diagnostic and therapeutic purposes.
- This approach can achieve favorable outcomes in selected cases of metastatic thymoma.
