Lung Cancer


Our precious lungs have the main missions of filtering the gaseous waste and supplying oxygen to our organs. But these can be exposed to malignant tumors. Lung cancer is the most deadly cancer in humans. It develops in the cells lining the walls of the bronchi and bronchioles of the lungs and manifests itself by many direct or indirect symptoms. Let's do a check in !

In the majority of cases, smoking is the most incriminated risk factor in the occurrence of these tumors. There are more than 9 out of 10 cancers in smokers and former smokers, both in men and women. Lung cancer is particularly lightning-fast because it spreads easily in the rest of the body (metastases in the lymph nodes, liver, bones, brain mainly). Lung cancer is all the more threatening because it is often diagnosed late.

Different types of lung cancer

There are two types of lung cancer of varying gravity, derived from bronchial cells of different origin and whose treatment varies according to the diagnosed case and the stage of development, these tumors develop and spread differently in the body.

Small cell lung cancer is the most dangerous form. About 20% of lung cancer cases occur in this form. When diagnosed, the risk that the cancer has already spread elsewhere in the body is not ruled out. It grows rapidly and is often impossible to treat with surgery. Chemotherapy with or without radiotherapy is the reference treatment.

Non-small cell lung cancer develops more slowly and accounts for about 80% of cases. It is detected and treated more easily than small cell cancer. Surgery is the reference treatment according to the stage of cancer and its degree of extension. This type of cancer occurs in the form of adenocarcinoma, squamous cell carcinoma and undifferentiated large cell carcinoma. There are other types of malignant, rarer tumors, including sarcoma and lymphoma.

The main causes of lung cancer

Smoking is the primary risk factor for lung cancer. This postulate is based on epidemiological studies and research carried out in molecular biology. Other factors are suspected to have an impact on the development of cancer, including exposure to second-hand smoke or carcinogenic airborne particles such as arsenic, Asbestos, radon or air pollutants.

Who is at risk?

Any smoker with a genetic predisposition to cancer could contract it. Experts argue that genetic factors may explain the fact that some casual smokers develop cancer, while large smokers do not develop it.

People with lung fibrosis, pneumonia, or tuberculosis, or any other chronic lung disease, such as scleroderma, are at increased risk for lung cancer.
Symptoms are difficult to identify

They are more recognizable as proliferation of the disease to other organs. A blood test will therefore give no sign that can lead to lung cancer. Only imaging and endoscopy can detect lung cancer.

The appearance of a dry and embarrassing cough, which persists for several weeks. The smoker's morning cough can also evolve into a more severe chronic cough, which persists all day. Expectorated mucus may also be bloody.
  • A respiratory infection that persists.
  • Pain in the chest or shoulder.
  • Loss of appetite and slimming.
  • Shortness of breath and repeated lung infections.
  • Fatigue and hoarseness associated with a cold or sore throat.
  • A swelling of the face or neck, when the cancer cells have invaded the lymph nodes.
  • Wheezing.
  • Hormonal or blood disorders caused by the release of tumor cells from substances that alter the levels of calcium or sodium in the blood.
  • Dysphonia (extinction or modification of the voice).
  • Difficulty swallowing and breathing.
  • Sagging of the eyelid or narrowing of the pupil of one eye




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