Stages of Lung Cancer

Stages of Lung Cancer

| from Booking Health GmbH | Diagnosis & treatment

Lung cancer is the most common oncological cause of death in men. This type of cancer is difficult to treat and in most cases it is diagnosed at a later stage. Lung cancer is 5-7 times more common in men. However, in recent years, there has been a trend towards a gradual decrease in this ratio. The disease is increasingly...

Lung cancer is the most common oncological cause of death in men. This type of cancer is difficult to treat and in most cases it is diagnosed at a later stage. Lung cancer is 5-7 times more common in men. However, in recent years, there has been a trend towards a gradual decrease in this ratio. The disease is increasingly diagnosed in women as well.


  1. What is lung cancer?
  2. Metastases in lung cancer
  3. Symptoms of metastatic cancer
  4. The principles of staging
  5. Initial stages of lung cancer
  6. Lung cancer of the 2nd stage
  7. Lung cancer of the 3rd stage
  8. Lung cancer of the 4rd stage
  9. Booking Health services

What is lung cancer?


One of the most life threatening oncological diseases is lung cancer. Why is this so? It is a malignant tumor that rapidly increases in size and causes metastases. Most people know that smoking causes lung cancer, thanks to the health warning advertised on the pack of cigarettes. Nevertheless, people continue to smoke and die from this  malignant neoplasm.

Few people know what lung cancer actually is. Most people think that the tumor develops from the lung tissue. In fact, what is called lung cancer is essentially a malignant neoplasm of the bronchi. It develops from the epithelium of the bronchial mucous membrane. According to histological structure, small cell and non-small cell lung cancers (including squamous cell lung cancer) are distinguished.

Here are the main features of the disease:

  • Adverse prognosis. About 50% of patients will not survive even 1 year after receiving the diagnosis.
  • Late detectability. Especially in case of peripheral lung cancer, when it develops from the small bronchi. Symptoms are practically nonexistent, or they are very mild. There can be  cough, but the patient perceives it as chronic bronchitis and does not pay much attention. Lung cancer is not accompanied by pain, which also causes late detection of the disease. There are no sensitive nerve endings in the lung tissue. Therefore, pain appears only after the tumor has spread to the pleura.
  • Rapid metastasis. Lungs are responsible for saturating the blood with oxygen. Therefore, it has a very good blood supply. The abundance of lymphatic and blood vessels leads to  lung cancer metastasizing very quickly.

Metastases in lung cancer


This type of cancer metastasizes rather rapidly. People often wonder at what stage of lung cancer do metastases develop. They form in the 2nd stage in the nearest lymph nodes. Lung cancer metastases to distant organs and tissues already by the 4th stage of lung cancer.

There are three ways how tumor can metastasize:

  • Hematogenic
  • Lymphogenic
  • Implantation

The lymphogenic way is the first one to develop. Pulmonary lymph nodes are located in the lung tissue, at the points of division of segmental bronchi. Bronchopulmonary lymph nodes are located at the entrance of lungs. Another group, where lung cancer can metastasize, is tracheobronchial and bifurcation lymph nodes. They are located where the trachea is divided into two main bronchi: the right and the left one. Paratracheal lymph nodes are also located near trachea. Later, lung cancer metastasizes to the near-esophageal lymph nodes, causing symptoms of an esophagus cancer. Dysphagia occurs- there is difficulty swallowing and food does not easily pass through the esophagus.

Metastases can also spread by the hematogenous way - through the blood. They are most likely to appear in the liver, where lung cancer metastasizes in 42% of patients (data obtained from autopsy results). Metastases are found in the kidney in 16% of people who died as a result of lung cancer. In 15% of patients metastases are detected in bones and adrenal glands. Metastases which spread to the brain are also often diagnosed. Secondary tumors can also be found in the bone marrow.

However strange it may sound, lung cancer also gives metastasis to the lungs. They are found in 24% of patients according to autopsy data. As already mentioned, the disease, despite its name, primarily develops from the bronchial mucosa. However, later on metastases can spread to the lung tissue through blood vessels. Multiple carcinomatosis can also appear.

Finally, we need to determine how lung cancer metastasizes by implantation. The tumor gradually increases in size and spreads to the pleura. This is the shell that surrounds the lungs from the outside. As a result of metastases in the pleura, pleural carcinomatosis and cancerous pleurisy develop.

Symptoms of Metastatic Cancer


Often, the first symptoms of lung cancer depend on the location where lung cancer gives metastases. The symptoms of lung cancer are most often manifested by the onset of metastatic foci in the mediastinum. The tumor spreads to the lymph nodes, which rapidly increase in size and squeeze the surrounding organs and tissues. This form of lung cancer is called mediastinal. Sometimes metastases affects the lymph nodes around the superior vena cava. This can cause facial swelling, dyspnea, cyanosis (blue color) of the skin and appearance of  the venous network on the chest wall.

If lung cancer metastasized to the central nervous system, it is manifested by focal symptoms. There may be paresis, paralysis, problems with speech, vision and other functions, depending on the location of the secondary tumors. All patients who were detected with tumor in the lungs undergo brain examination for the purpose of detecting metastases. Most people suffer from symptoms associated with brain damage, but in 10% of cases metastases in the central nervous system are not manifested by any symptoms. This is due to its location in the "silent" areas of the brain.

The most frequent organ where lung cancer metastasizes is the liver. With it had been affected by lung cancer, patients complain of pain in the right upper quadrant. They may develop jaundice, ascites (accumulation of fluid in the abdominal cavity) and a venous network on the abdomen. Symptoms depend on the localization of metastases and their size. Over time, they can lead to liver failure. Bleeding from the blood vessels of the liver often becomes the direct cause of death in patients with lung cancer. Such an outcome is more likely if the primary tumor has a relatively small size.


Stages of Lung Cancer
(c) depositphotos


The principles of staging


The stages of lung cancer are established on the basis of three parameters:

  • Main tumor
  • Near metastases
  • Distant metastases

They are denoted by letters T, N and M, respectively. Below are the basic signs used in the diagnosis and determination of the lung cancer stage.

Primary tumor

  • Tx - tumor cells are found, but the tumor itself can not be determined, or its evaluation is impossible.
  • T0 - primary tumor is absent (cancer may manifest itself by metastatic tumors, while the primary neoplasm remains very small and invisible).
  • Tis - cancer is localized (it does not go beyond the bronchus).
  • T1 - tumor in the lungs is no more than 3 cm, does not extend beyond the pulmonary parenchyma and does not germinate the pleura. According to bronchoscopy it does not extend beyond the lobar bronchus.
  • T2 - the tumor is larger than 3 cm, the main bronchus is affected, the tumor spreads to the visceral pleura. There may be atelectasis - a decline in the proportion of the lung, when the alveoli do not fill with air and do not straighten.
  • T3 - a tumor of any size spreads to the thorax, diaphragm, mediastinum, pleura or heart sac. T3 can also be determined if there is atelectasis of the entire lung or if the main bronchus is damaged when the tumor is less than 2 centimeters from the keel of the trachea (the site of its separation).
  • T4 - is diagnosed when the tumor spreads into the esophagus, heart, blood vessels, trachea, spine, distant lung lobes, or if metastatic pleurisy develops.

Regional metastases

  • Nx - it is not known if there are any near metastases
  • N0 - the patient was examined and there are no metastases
  • N1 - there is metastatic damage to the basal or intrapulmonary lymph nodes
  • N2 - the lower tracheo-bronchial lymph nodes or nodes of the mediastinum are damaged, but only on the side of primary tumor localization
  • N3 - there are metastases in the prelestinal, supraclavicular or basal lymph nodes on either side of the main tumor

Remote metastases

  • Mx - it is not known whether there are metastases in distant organs and tissues
  • M0 - no metastases
  • M1 - distant metastases were detected

Initial stages of lung cancer


As it is known, there are four stages in lung cancer. However, there are actually six of them, because there are three, not one, initial stages of lung cancer:

Latent cancer. Denoted as TxN0M0. This means that the primary tumor was not detected. However, the biopsy of the bronchi and cytological analysis showed the presence of atypical cells in the material.

Stage 0. Denoted as TisN0M0. Cancer is detected, but the primary tumor is concentrated in the bronchial mucosa and does not extend to the lung parenchyma. This is a favorable form of the disease. Another name of this cancer stage is compensated cancer. This means that the tumor can not grow, because the body restrains its increase in size. The tumor can stay at this stage 5-10 years and more. This stage of lung cancer is rarely diagnosed. There are no symptoms. Accordingly, there is no reason for a person to be examined.

The 1st stage. Lung cancer of the first stage is characterized by the absence of any metastases: both near and distant. There are 2 substages: A and B. The difference is that substage A is characterized by the primary tumor T1, whereby sub-stage B is characterized by the presence of T2 tumor.

Lung Cancer of the 2nd stage


Stage 2 of lung cancer is characterized by the appearance of metastases in the nearby lymph nodes. However, there are no distant metastases yet.

According to the international classification, lung cancer of the 2nd stage is divided into two sub-stages: A and B. They differ only in the characteristics of the primary tumor. In substage A, the tumor  corresponds to T1. In substage B, the primary tumor tissue corresponds to T2 or T3. At the 2nd stage cancer can be quite severe, which presents an unfavorable prognosis for the patient's life. However, if the primary tumor meets the T3 criteria, then the 2nd stage is diagnosed only if there are no near metastases. If they appear, it is already considered lung cancer of the third degree.

Lung cancer of the 3rd stage


Lung cancer of the 3rd stage has regional metastases. The tumor size can be different, it can be T1, T2 or T3. However, if in the second stage the indicator of regional metastasis can only be N1, which means the presence of metastases only in the basal or intrapulmonary lymph nodes on the affected side, stage 3 is basically denoted as N2. That is, regional metastases can also be found in the nodes of the mediastinum or tracheobronchial lymph nodes.

Stage 3 of lung cancer is divided into two substages: A or B. Substage A meets the criteria for regional metastasis of N2 or N1 if the primary tumor corresponds to T3. Substage B is diagnosed if the tumor reaches the size of T4, but does not yet have distant metastases. Or if the regional metastases correspond to the indicator N3.

Lung cancer of the 4rd stage


The last stage of lung cancer is characterized in a very simple way. There are no sub-stages there. The amount and location of regional metastases do not matter. The size and location of the primary tumor do not matter as well. Lung cancer of the 4th stage is diagnosed if there are distant metastases - this is the main and only criterion. All patients are accurately examined for the purpose of assessing the possibility of surgery for lung cancer. Radical treatment is only possible if the tumor is limited to the thorax. Otherwise, lung cancer at stage 4 is considered inoperable.

To identify distant metastases, the following diagnostic methods are used:

  • Scintigraphy of bones
  • If technology is not available - radiography of those bones where there is soreness
  • MRI or CT of the brain

There is no sense in operating lung cancer at the 4th stage. All distant metastases can not be removed. After all, a doctor would have to operate brain, liver, remove fragments of bones, etc. Even if only one distant metastasis was detected, lung cancer at stage 4 is still not treated surgically. After all, there is a high probability that there are other distant metastases that were either not detected or can not be detected because of their microscopic size. However, over time they will increase in size, so radical treatment of lung cancer at this last stage is not feasible. It only prolongs the sufferings of the patient, but does not increase the duration of their life.

However, the treatment of lung cancer at the 4th stage can be carried out with radiation therapy and chemotherapy. This slightly increases the life expectancy of the patient - for several months, and sometimes even for several years.

How many patients live with lung cancer with metastases depends on the quality of the treatment, the histological type and the location of the tumor. Based on these parameters and also on the location of metastases, the five-year survival rates range from 1 to 10%.

Services Booking Health


As the survival statistics show, much better results in the treatment of lung cancer, including stage 4 lung cancer are achieved in countries with a higher level of medical development. Many people prefer to be treated in Germany. In this country, modern methods of radical and conservative treatment are available, prolonging the life of the patient and aspiring to improv its quality.

However, when it comes to organizing a treatment trip, patients face a lot of difficulties. Here are some of them:

  • They do not know which clinic to choose in order to get better treatment results.
  • There is no adequate information on the cost of treatment services.
  • It is difficult to contact the administration of the clinic -  A response to a request may take a month or not happen at all. However, lung cancer progresses very quickly, and the person should receive help as soon as possible.
  • The language barrier hinders comfortable communication with the administration and medical staff of the clinic.
  • If you find an interpreter, he/she may incorrectly translate your medical records. This will, at best, lead to additional diagnostic procedures, and at worst - wrong treatment chosen.
  • The patient has to worry about such problems as issuing a visa, booking airline tickets, searching for and booking a hotel near the clinic, transfer from the airport to a medical facility, etc.

Booking Health can take care of all these stressful issues. We will help you get a response from the clinic and go to Germany for treatment as soon as possible. We will translate your medical documentation, meet you at the German airport and take you to the clinic, provide an interpreter, organize any accommodation in Germany, and solve all the organizational problems that arise.

Cost of the surgical lung cancer treatment in different countries:


from 23,100 EUR


from 20,600 EUR


from 18,700 EUR


In addition, contacting us will enable you to choose the best clinic and book a treatment program at an affordable price. We have direct contracts with all major German clinics. We will also give you insurance, so you will save up to 70% of the cost of medical services. By using the services of Booking Health, you will get rid of unnecessary worries and will able to focus only on restoring your health.


Treatment of lung cancer in Germany
(c) depositphotos


Choose treatment abroad and you will for sure get the best results!


Author: Dr. Nadezhda Ivanisova



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