Robotic thoracic surgery of the right lower anterior mediastinal mass.

Medical history: the patient visited our outpatient department after he was found to be with a mediastinal mass during health check-up ten days ago. Then, he was admitted in our hospital with a diagnosis of “mediastinal mass”. He had no symptom such as chest tightness, shortness of breath, fever, or heart palpitations. His mental status, physical performance, appetite, and sleep were normal, and the body weight did not obviously change. His urination and defecation were normal.