[Rare localization of a monstrous thymoma in the anterior inferior mediastinum].

90% of all thymomas are localized in the anterior-superior mediastinum, seldom in the inferior or posterior mediastinum. We report the rare case of a 61 year-old female patient who presented with a large thymoma of the anterior-inferior mediastinum with the chief complaint of position-dependent dyspnoea secondary to compression of the left lung. Surgical resection of a tumor weighing 1053 g was successfully performed and 8 months postoperatively the patients is asymptomatic and without evidence of recurrence.