[A case of mediastinal chordoma with Horner's syndrome].

Mediastinal chordoma is a very rare disease. A 32-year-old man was admitted for chest abnormal shadow on the left upper mediastinum. He had left Horner's syndrome on admission. T2 weighted MR image showed heterogeneous tumor shadow. Angiographically, the tumor had feeding arteries. Gallium scintigraphy indicated no abnormal accumulation. Operation was performed and the resected tumor was found to be a chordoma pathologically. He lives well without recurrence and metastasis for 2 years.