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What is lung cancer
Lung cancer is the most common primary lung cancer, the vast majority of lung cancer at the origin of the bronchial mucosa, it is also known as bronchial lung cancer. The last 50 years, the industrial world, especially developed countries, lung cancer incidence and mortality are rising rapidly, died of cancer in male patients with lung cancer have been on top of the list. More than 40 years ago in China as a result of lung disease surgery patients, for the vast majority of tuberculosis, bronchiectasis is followed, such as lung abscess purulent infection disease, one of the few cases of lung cancer.Nearly 30 years, lung resection of the increasing cases of lung cancer, has leapt to the top. According to statistics, Shanghai malignant tumors in male cancer cases, lung cancer incidence increased rapidly, ranking first.

Overview of pathology

The origin of lung cancer in bronchial epithelial basement membrane limited to those with cancer known as carcinoma in situ to the bronchial cavity and / or close to the growth of lung tissue and lymph through the blood transfer or proliferation of bronchial tumor growth and spread of the transfer of And the situation of histologic types of tumor differentiation, and other biological characteristics of a certain relationship .

The distribution of lung cancer than the right lung on the left lower lobe than leaves from the main bronchial bronchiole to be the origin of cancer occurred in the main bronchus of the bronchial lung cancer are known as the hilar location close to the central lung cancer; originated in the lung paragraph Following the location of the bronchial lung cancer in the lung around the part of those who called peripheral lung cancer .

(A) general clinical classification will be divided into the following four types of lung cancer

1. Squamous cell carcinoma (also known as squamous cell carcinoma): The most common types of lung cancer accounts for about 50% of patients age 50 in most of the men over the age of majority at the origin of most of the larger bronchial often although the central lung cancer Squamous cell division is different but the general level of growth is relatively slow pace of development on a longer course of radiation and chemotherapy more sensitive by the first lymph node metastasis occurred in late

2. Undifferentiated carcinoma: incidence of squamous cell carcinoma after the onset age for men was particularly prevalent in the less general in the origin of a larger UN-central bronchial lung cancer cells under the form of oat cell can be divided into small round cell and large cell types, etc. Among them, oat cell undifferentiated carcinoma, the most common malignancy of high growth and rapid emergence of early lymphatic and blood on the transfer of extensive radiation and chemotherapy more sensitive in all types of lung cancer in the worst prognosis .

3. Adenocarcinoma: on the origin of the bronchial mucosa in the origin of a small number of large bronchial mucous glands than the incidence of squamous cell carcinoma and undifferentiated carcinoma of the low incidence of young women most often relatively small at the origin of adenocarcinoma of the bronchial for peripheral lung cancer early In general no obvious clinical symptoms are often in the chest x-ray examination was found for the performance of the round or oval lumps generally slower growth but sometimes that occurred early lymph node metastasis occurred late.

4. Alveolar cell carcinoma: on the origin of the bronchial mucosa, also known as bronchioloalveolar cell carcinoma or adenocarcinoma bronchioles in the lung field around the site in the incidence of lung cancer in women in the lowest compared with a higher degree of differentiation in general often slow the growth of cancer Bronchioloalveolar cells along the tube wall and alveolar growth without infringing alveolar septal blood and lymphatic metastasis may occur, but later spread to other bronchial or lung cancer cells in violation of pleural lavage in the form of nodular and there are two types of diffuse the former Can be single or nodule nodules; the latter form of pneumonia lesions similar to the limited scope of the nodular surgery to remove a good effect .