Table 1. Detailed characteristics of the 21 patients who underwent two-port robotic assisted anterior mediastinal mass resection.

No.	Sex	Age (years)	Diagnosis	Size (cm)	Approach	Operation time (min)	Drain Removed (days)	Morbidity
1	F	60	Thymic cyst	5.0	Lt. transthoracic	190	1	–
2	F	56	Thymic cyst	4.5	Rt. transthoracic	140	3	–
3	M	68	Thymic cyst	5.5	Subxiphoid	146	2	–
4	F	51	Thymoma AB	6.0	Rt. transthoracic	145	3	–
5	F	60	Thymoma AB	8.5	Rt. transthoracic	192	2	–
6	M	54	Thymoma AB	16	Subxiphoid	363	9	Prolonged air leak
7	M	65	Thymoma AB	6.8	Subxiphoid	175	1	–
8	F	61	Thymoma AB	4.5	Subxiphoid	133	1	–
9	F	56	Thymoma AB	3.3	Rt. transthoracic	165	1	–
10	F	79	Thymoma AB	5.3	Subxiphoid	337	1	–
11	F	47	Thymoma AB	7.5	Subxiphoid	160	2	–
12	M	42	Thymoma B1	6.6	Subxiphoid	220	1	–
13	M	48	Thymoma B1	4.1	Subxiphoid	132	2	–
14	F	63	Thymoma B1	11.9	Subxiphoid	316	2	–
15	M	39	Thymoma B1+B2	6.2	Rt. transthoracic	130	3	–
16	F	55	Thymoma B3	6.0	Lt. transthoracic	188	3	–
17	M	56	Thymic carcinoma, thymoma B2	5.1	Subxiphoid	283	3	–
18	F	39	Teratoma	7.4	Subxiphoid	131	5	–
19	M	62	Teratoma	5.3	Subxiphoid	130	2	–
20	F	24	Teratoma	6.2	Lt. transthoracic	155	1	Vocal cord palsy
21	M	50	Bronchogenic cyst	2.7	Subxiphoid	196	1	–

F, female; M, male.