Mediastinal thymolipoma with striated myoid cells: report of a peculiar case.

Thymolipoma is a rare anterior mediastinal tumor composed of mature adipose tissue and benign thymic tissue, and is a benign neoplasm for which complete surgical excision is curative.1 Literature has reported that the thymic parenchyma of thymolipoma exceptionally contain myoid cells that are immunoreactive for desmin, muscle-specific actin and myoglobin.2,3 Herein, we describe a very rare case of thymolipoma with myoid cells. To the best of our knowledge, this is the sixth case of thymolipoma containing striated myoid cells in the English literature since 1972.