Mediastinal lipoma in children.

Mediastinal masses are uncommonly encountered in childhood. These tumours are often interesting because of the varied mediastinal tissues from which they arise. Despite extensive investigations, a large percentage of these lesions remain undiagnosed prior to operation. We describe two rare cases of mediastinal lipoma. The first was incidentally diagnosed whereas the second patient presented with respiratory symptoms. The definitive diagnosis was established at surgery, which was curative.