A third of all people with a<unk>  have symptoms caused by compression of the surrounding organs by an expansive mass. These problems may take the form of superior vena cava syndrome, dysphagia (difficulty swallowing), cough, or chest pain. One-third of patients have their tumors discovered because they have an associated autoimmune disorder. As mentioned earlier, the most common of those conditions is myasthenia gravis (MG); 10–15% of patients with MG have a<unk>  and, conversely, 30–45% of patients with<unk> s have MG. Additional associated autoimmune conditions include<unk> -associated multiorgan autoimmunity, pure red cell aplasia and Good syndrome<unk>  with combined immunodeficiency and hypogammaglobulinemia). Other reported disease associations are with acute pericarditis, agranulocytosis, alopecia areata, ulcerative colitis, Cushing's disease, hemolytic anemia, limbic encephalopathy, myocarditis, nephrotic syndrome, panhypopituitarism, pernicious anemia, polymyositis, rheumatoid arthritis, sarcoidosis, scleroderma, sensorimotor radiculopathy, stiff person syndrome, systemic lupus erythematosus and thyroiditis. One-third to one-half of all persons with<unk>  have no symptoms at all, and the mass is identified on a chest X-ray or CT/CAT scan performed for an unrelated problem.
Thymoma
Thyroid nodule
Lymphoma
Histiocytoma
Thyroid adenoma
Endemic goitre
Thyroid cancer
Thyroid lymphoma