Myasthenia gravis is a neuromuscular autoimmune disorder in which the predominant symptom is muscle weakness that fluctuates during the day and mainly affects the ocular and bulbar muscles. There is an intimate relationship between thymus abnormalities, the extirpation allows in many cases a better control of the disease and as long as they are resectable it must be part of the initial treatment. We present a case of a patient with myasthenia gravis and thymoma in whom the initial treatment was surgical.