[Angiolipoma Arising in the Posterior Mediastinum:Report of a Case].

The patient was an 82-year-old man. A posterior mediastinal tumor was noted on chest computed tomography (CT). Magnetic resonance imaging (MRI) scan showed a high signal on both T1- and T2-weighted imaging. Lipoma was suspected, but since the border with the vertebral body was partially unclear, video-assisted tumor resection was performed for diagnosis and treatment purposes. Finally, we diagnosed it as non-infiltrating angiolipoma. Angiolipoma is a benign tumor that accounts for 5-17% of all lipomas. Pathologically, they can be divided into two types:infiltrating and non-infiltrating. Most are non-infiltrating, but recurrent cases of the infiltrating type have been reported. Angiolipoma commonly occurs in subcutaneous tissues of the upper extremity and trunk, but we report a rare case that occurred in the posterior mediastinum.