Two surgical cases of micronodular thymoma with lymphoid stroma

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  • リンパ性間質を伴う小結節性胸腺腫の2手術例

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Abstract

<p>Case 1. The patient was a 59-year-old male with an anterior mediastinal tumor detected on CT. CT showed a 15-mm nodule that was non-uniformly contrasted, and MRI showed a shadow with a low signal. We performed thoracoscopic resection for diagnosis and treatment of a suspected high-density protein cyst or thymoma. The resected specimen was histologically diagnosed as a micronodular thymoma with lymphoid stroma (MNT). Case 2. The patient was a 63-year-old man with an anterior mediastinal tumor and solitary pulmonary nodule detected on CT during follow-up for rectal cancer. CT showed a 13-mm nodule with homogeneous enhancement that tended to increase in the mediastinum, and an 8-mm nodule in the lower right lobe. MRI showed a well-marginated 19-mm nodule with a low signal. We performed thoracoscopic resection for diagnosis and treatment of a suspected thymoma and metastatic lung tumor. The resected specimen was diagnosed as MNT and a metastatic lung tumor of rectal cancer histologically. Recurrence of neither has been observed.</p>

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