Diagnosis of this type of lung cancer is by biopsy, histology and special staining. CT and colonoscopy to rule out a colonic primary are recommended.
Pulmonary enteric adenocarcinoma
Large cell neuroendocrine carcinoma of the lung
Atypical pulmonary carcinoid tumour
Salivary gland–like carcinoma of the lung
Mucinous cystadenocarcinoma of the lung
Epithelial-myoepithelial carcinoma of the lung
Goblet cell carcinoid
Oesophagogastric junctional adenocarcinoma