Table 3.

Surgeries for the enrolled UCDs and MCDs

	UCD (n = 16)	MCD (n = 32)
Thoracic surgery
Open thoracic surgery	16/100%	0
VATS ξ	1/16.67%	8/25%
Abdominal surgery	0	1/3.12%
Superficial LN biopsy	0	21/65.6%
Cervical LN	0	9/28.13%
Axillary LN	0	6/18.75%
Supratrochlear LN	0	1/3.12%
Percutaneous lung biopsy	0	2/6.25%

VATS: video-assisted thoracic surgery LN: Lymphonode.

^ξOne case with UCD was performed VATS initially, then he was changed to open thoracic surgery because of severe adhesion in the surgery field.