Giant Intrathoracic Schwannoma of the left vagus nerve presenting as atrial fibrillation

Posterior mediastinal tumors are not infrequent, and among them neurogenic masses and schwannomas are the most common histological variety. They are benign, initially asymptomatic tumors and later become symptomatic due to the mass effect. Surgical excision is the preferred therapy and the approach can be evaluated according to the dimensions of the lesion. We report the case of a giant schwannoma, originating from the left vagus nerve, in a middle-aged woman whose symptoms were exertion-induced dyspnoea and atrial fibrillation.