[Tumors of the phrenic nerve]

A schwannoma of the phrenic nerve is a rare disorder which presents as a tumour of the anterior mediastinum. It is seen in adults and is usually latent. We report two cases in elderly subjects in whom the phrenic nerve tumour had achieved a significant size. One of these schwannomas had degenerated into sarcomatous change which is the first case reported to the present time.