Posterior mediastinal tumors are not infrequent, and among them neurogenic masses and schwannomas are the most common histologic varieties. These benign, initially asymptomatic tumors later become symptomatic as a result of mass effect. Surgical excision is the preferred therapy, and the approach can be determined according to the dimensions of the lesion. This report describes the case of a giant schwannoma originating from the left vagus nerve in a middle-aged woman whose symptoms were exertion-induced dyspnea and atrial fibrillation.
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