Table 4.

Histopathologic types and percentages of lung tumors.

Histopathogy	n (%)
Squamous cell carcinoma	221 (42.3%)
Nonsmall cell lung carcinoma	151 (28.9%)
Small cell lung carcinoma	47 (9.0%)
Adenocarcinoma	39 (7.5%)
Carcinoid tumor	45 (8.6%)
Adenoid cystic carcinoma	6 (1.1%)
Carcinoma in-situ	4 (0.8%)
Low differentiated carcinoma	3 (0.6%)
Malignant mesenchimal tumor	3 (0.6%)
Low grade neuroendocrine tumor	2 (0.4%)
High grade neuroendocrine tumor	1 (0.2%)
Papillary malignant epithelial tumor	1 (0.2%)
Total	523 (100.0%)

* Pathology reports of 27 patients could not be found.