Table 6

4. Tracheal tumor

	Cases	30-day mortality		Hospital mortality
		Hospital	After discharge
4. Tracheal tumor	73	0	0	1 (1.4)
(A) Primary malignant tumor (histological classification)
Squamous cell carcinoma	4	0	0	0
Adenoid cystic carcinoma	19	0	0	0
Mucoepidermoid carcinoma	1	0	0	0
Others	1	0	0	0
Total	25	0	0	0
(B) Metastatic/invasive malignant tumor e.g. invasion of thyroid cancer	23	0	0	1 (4.3)
(C) Benign tracheal tumor (histological classification)
Papilloma	1	0	0	0
Adenoma	2	0	0	0
Neurofibroma	2	0	0	0
Chondroma	1	0	0	0
Leiomyoma	0	0	0	0
Others	19	0	0	0
Histology unknown	0	0	0	0
Total	25	0	0	0
Operation
Sleeve resection with reconstruction	28	0	0	0
Wedge with simple closure	4	0	0	0
Wedge with patch closure	0	0	0	0
Total laryngectomy with tracheostomy	2	0	0	1 (50.0)
Others	38	0	0	0
Unknown	1	0	0	0
Total	73	0	0	1 (1.4)

Values in parenthesis represent mortality %