Lung cancer can be divided into several types according to its location and morphology What are its

1.Squamous cell carcinoma (also known as squamous cell carcinoma).

It is most common among all types of lung cancer, accounting for about 50%. Most of the patients are over 50 years old, and most men are affected. Most of them originate from the larger bronchial tubes and are often type ** lung cancer.

Although the degree of differentiation of squamous cell carcinoma varies, the growth and development rate is relatively slow and the course of the disease is longer. Sensitive to radiation and chemistry**. Lymphatic metastasis occurs first, and hematogenous metastases occur later.

Squamous cell carcinoma is one of the clinical types of lung cancer.

2.Undifferentiated carcinoma.

The incidence is second only to squamous cell carcinoma, which is more common in men and at a younger age, and is a common clinical type of lung cancer. Generally originates from the larger bronchi. According to the morphology of tissue cells, type ** lung cancer can be divided into several types, such as oat cells, small round cells and large cells, among which oat cells are the most common.

Undifferentiated carcinoma has a high degree of malignancy, rapid growth, and extensive lymphatic and hematogenous metastasis occurs earlier, is more sensitive to radiation and chemistry**, and has the worst prognosis among all types of lung cancer.

3.Adenocarcinoma. Originates from the bronchial mucosal epithelium and, rarely, from the mucous glands of the large bronchi.

The incidence is lower than that of squamous cell carcinoma and undifferentiated carcinoma, and the age of onset is younger, and it is relatively more common in women. Most adenocarcinomas originate in the smaller bronchial tubes and are peripheral lung cancers. There are usually no obvious clinical symptoms in the early stages, and they are often detected on chest x-ray.

Presents as a round or oval mass that usually grows slowly, but sometimes hematogenous metastases occur early. Lymphatic metastases occur later.

4.Alveolar cell carcinoma.

Originating from the bronchial mucosal epithelium, it is also known as bronchiolar alveolar cell carcinoma or bronchiolar adenocarcinoma, and also appears as one of the clinical types of lung cancer. It is located around the lung field, and the incidence rate of all types of lung cancer is the lowest, and it is more common in women. In general, the degree of differentiation is higher and the growth is slower.

Cancer cells grow along the bronchiolar alveolar ducts and alveolar walls without violating the alveolar septum. Lymphatic and hematogenous metastases occur late but may spread through the bronchial tubes to other lobes or invade the pleura.

According to the location, it can be divided into ** and surrounding.

I didn't say that it was divided according to the form, and I don't know the specific meaning.

1. Small cell lung cancer: small cell lung cancer (SCLC) or oat cell carcinoma, nearly 20% of lung cancer patients belong to this type; Small cell lung cancer (SCLC) has a short doubling time and rapid progression, often accompanied by endocrine abnormalities or carcinoid syndrome; Because patients have hematogenous metastasis in the early stage and are sensitive to chemoradiotherapy, systemic chemotherapy should be the main treatment of small cell lung cancer, combined with radiotherapy and surgery. The key to success in comprehensive lineage small cell lung cancer.

2. Non-small cell lung cancer: Non-small cell lung cancer (NSCLC) class, about 80% of lung cancer patients belong to this type. This distinction is quite important because the regimens for these two types of lung cancer are very different.

Chemistry is the main treatment for small cell lung cancer patients, and surgery does not play a major role in this type of lung cancer patients. On the other hand, surgery** is mainly for patients with non-small cell lung cancer.

Lung cancer can be classified as intraductal: the tumour is confined to the larger bronchial lumen. Pipe wall infiltration type:

Massy: The mass is irregularly shaped and poorly demarcated from the surrounding lung tissue. Diffuse infiltrate:

The tumour does not form a localized mass but is diffuse and infiltrates a lobe or large portion of the lung that mimics lobar pneumonia.

Answer]: The pathological classification of lung cancer is usually divided into four types: Squamous cell carcinoma (squamous cell carcinoma):

It is the most common in lung cancer, accounting for about 50%, and most of the lesions originate from the large bronchial squamous epithelium, and the proximal hilar excitation is mostly central. Adenocarcinoma: The age of onset is young, with most adenocarcinomas originating in the small bronchial epithelium and a few in the large bronchi. About 75% of adenocarcinomas are peripheral; Small cell carcinoma (small cell undifferentiated carcinoma):

The incidence is lower than that of squamous cell carcinoma, the age of onset is younger, and it is more common in men. It generally originates from the large bronchi and is mostly central. Extremely poor differentiation, fast growth, high degree of malignancy; Large cell carcinoma:

This type of lung cancer is very rare. Therefore, C.

This is what I looked for in a book. You make a reference!

Classification: 1 Squamous cell carcinoma (squamous cell carcinoma).

2 Small cell carcinoma (undifferentiated small cell carcinoma).

3 adenocarcinoma. 4 large cell carcinomas.

5. Adenosquamous cell carcinoma. 6. Pleomorphic, sarcomatoid or sarcoma-containing carcinoma.

7 types of carcinoma. 8. Salivary gland carcinoma.

9 Unclassified cancers.

Features: 1 Squamous cell carcinoma (squamous cell carcinoma): the most common in lung cancer, accounting for about 50%, most of the patients are over 50 years old, most of them are male, most of them originate from the larger bronchi, often central lung cancer.

Although squamous cell carcinoma has different degrees of differentiation, it still grows slowly, has a long course of disease, and is more sensitive to radiation and chemistry**. Lymphatic metastases usually begin first, with hematogenous metastases occurring later.

2. Small cell carcinoma (undifferentiated small cell carcinoma): the incidence is lower than that of squamous cell carcinoma, the age of onset is younger, it is more common in men, generally originates from the larger bronchi, and most of them are central lung cancer. The cell morphology is similar to that of small lymphocytes, resembling an oat ear, so it is also called oat cell carcinoma.

Small cell carcinoma contains neuroendocrine granules in its cytoplasm, and small cell carcinoma has a high degree of malignancy, rapid growth, and extensive lymphatic and hematogenous metastasis occurs earlier. Although it is more sensitive to radiation and chemistry**, it has a poor prognosis in all types of lung cancer.

3. Adenocarcinoma: the age of onset is young, and women are relatively more common. Most originate from the smaller bronchial epithelium, most are peripheral lung cancers, and a few originate from the large bronchi.

In the early stages, there are usually no obvious clinical symptoms, and it is often found on chest x-ray, which appears as a round or oval lobulated mass. Growth is generally slower, but hematogenous metastases sometimes occur early and lymphatic metastases occur later.

4. Large cell carcinoma: This type of lung cancer is very rare, and about half of all cases originate in the large bronchi. The cells are large and the cytoplasm is abundant. The nucleus is morphologically diverse and irregularly arranged. Large cell carcinoma is poorly differentiated and is often detected after brain metastases have occurred. The prognosis is poor.

Answer] Steak: a

Lung cancer is divided into two categories: small cell carcinoma and non-small cell carcinoma, and non-small cell lung cancer is divided into three types: lung adenocarcinoma, squamous epithelial cell carcinoma and large cell lung cancer. Among them, lung rehysteric adenocarcinoma accounted for 60% of the total; followed by squamous cell carcinoma about 15% to 20%; Large cell lung cancer accounts for only 5%, and small royal cell lung cancer accounts for about 13%.

Answer]: B The closed histological types of lung cancer include squamous cell carcinoma, adenocarcinoma, small cell carcinoma and large cell carcinoma, among which squamous cell carcinoma is the most common, accounting for 50% 70%, and the second most common source state is small cell carcinoma, so B is correct. For this hail roll, you should choose B.

Zhen Shi missed the answer to the rotten case]: a

Squamous cell carcinoma (squamous cell carcinoma) is the most common type of retroactive lung cancer, accounting for about 50% of cases, and is more common in men over 50 years old, with type ** lung cancer being more common. Slow growth, late hematogenous metastasis, and long course of disease.

Lung cancer is generally classified into the following four types:

1) Squamous cell carcinoma (squamous cell carcinoma): the most common.

2) Small cell carcinoma (undifferentiated small cell carcinoma): The cell morphology is similar to that of small lymphocytes, shaped like oat grains, so it is also called oat cell carcinoma, with a high degree of malignancy.

3) Adenocarcinoma: Bronchiolar alveolar carcinoma is a type of adenocarcinoma.

4) Large cell carcinoma: low degree of differentiation and poor prognosis. This type of lung cancer is very rare. Lung cancer is generally classified into the following four types:

1) Squamous cell carcinoma (squamous cell carcinoma): the most common.

2) Small cell carcinoma (undifferentiated small cell carcinoma): The shape of the fine rush round cell is similar to that of small lymphocytes, like the grain of oats, so it is also called oat cell carcinoma, and the degree of malignancy is high.

3) Adenocarcinoma: bronchiolar alveolar carcinoma is a type of adenocarcinoma.

4) Large cell carcinoma: low degree of differentiation and poor prognosis. This type of lung cancer is very rare.