<unk>  is a common histological form of lung cancer.<unk>  may be classified according to WHO into 8 subtypes: Lepidic, acinar, papillary, micropapillary, solid, colloid, fetal, enteric<unk> .<unk>  may be classified according to IASLC/ATS/ERS into 3 main types:<unk>  in situ, minimally invasive<unk> , invasive<unk> . On gross pathology, peripheral multifocal lesions is the characteristic finding of<unk> . On microscopic histopathological analysis, nuclear atypia, eccentrically placed nuclei, abundant cytoplasm, and conspicuous nucleoli are characteristic findings of<unk> . Genes involved in the pathogenesis of<unk>  include EGFR, HER2, KRAS, ALK, and BRAF. Common risk factors in the development of<unk>  include smoking, family history of lung cancer, high levels of air pollution, radiation therapy to the chest, radon gas, asbestos, occupational exposure to chemical carcinogens, and previous lung disease. The incidence of<unk>  is approximately 22.1 per 100,000 individuals worldwide.<unk>  affects men and women equally. Patients of all age groups may develop<unk> . Common symptoms of<unk>  include dyspnea, hemoptysis, chronic coughing, chest pain, cachexia, dysphonia, and paraneoplastic syndromes.<unk>  may be classified into several subtypes based on TNM and UICC staging system. The predominant therapy for<unk>  is surgical resection. Adjunctive chemotherapy, radiation therapy, and target therapy may be required. Common complications of<unk>  include breathing difficulties, pneumonia, pleural effusion, metastasis, and Horner's syndrome. The prognosis of<unk>  varies with the staging of tumor; Stage IA have the most favorable prognosis. The presence of metastasis is associated with a particularly poor prognosis.
Adenocarcinoma of the lung
Large cell carcinoma of the lung
Small cell carcinoma of the lung
Sarcomatoid carcinoma of the lung
Non small cell lung cancer
Squamous cell carcinoma of the lung
Mesothelioma
Hemangioendothelioma