<unk>  is a term that encompasses five distinct histological subtypes of lung cancer, including (1) pleomorphic carcinoma, (2) spindle cell carcinoma, (3) giant cell carcinoma, (4) carcinosarcoma, or (5) pulmonary blastoma.
Sarcomatoid carcinoma of the lung
Epithelial-myoepithelial carcinoma of the lung
Giant-cell carcinoma of the lung
Pulmonary sclerosing pneumocytoma
Mucinous cystadenocarcinoma of the lung
Adenocarcinoma of the lung
Salivary gland–like carcinoma of the lung
Adenosquamous lung carcinoma