Atypical type A thymoma component identified by pulmonary metastasectomy 11 years after surgery of type AB thymoma
Atypical type A thymomas exhibit more aggressive features than conventional type A thymomas.Type AB thymomas rarely have atypical type A components.We report a rare case of type AB thymoma with an atypical type A component, that was identified after pulmonary metastasectomy 11 years after the primary surgery and long-term follow-up after recurrence