What is thymoma?

It is the most common mediastinal neoplasm in adults, most frequent tumor of anterior mediastinum. Affects adults over 40 symptoms: cough, dyspnea, and chest pain (30% of pt), 40-70% have parathymic syndromes (Myasthenia gravis, hypogammaglobinemia, pure red cell aplasia and nonthymic malignancies) Some are asymptomatic and seen incidentally, 85% of people with MG have thymic lymphoid hyperplasia and only 15% have thymoma. However 30-50% of thymoma may have MG 10-15% have thymoma and hypogamma and pure red cell aplasia 12-20% have thymoma and thyroid/lung carcinoma