Thymoma presenting as a superior vena cava syndrome remission following therapy.

A 45-year-old male developed myasthenia gravis 8 years ago. He received prednisone for 3 years, and resumed complete clinical remission. Five years later, he was admitted with obstruction of the superior vena cava. Invasive thymoma was diagnosed by chest X-ray and an open lung biopsy. Radiation followed by combination chemotherapy with cyclophosphamide, vincristine, and prednisone induced a complete remission. The patient remained disease-free for more than 20 months after the first admission to our department. To the best of our knowledge, superior vena cava syndrome as the presenting symptom of thymoma has never been reported previously.