Different Types of Lung Cancer in The World
There are any different the types of lung cancer (lung cancer types, or tipos de cáncer de pulmón, tipi di cancro del polmone, types de cancer du poumon, lungenkrebs-typen) in the world. Bronchogenic carcinomas, better known as lung cancer deadly disease (carcinoma is another term for cancer), are broadly classified into two types : lung cancer small cell (SCLC) and non-cancer, small cell (NSCLC). This classification is based on the microscopic appearance of tumor cells. Both types of cancer growth and spread in different ways and may have different treatment options, so a distinction between these two types is important.
SCLC represents approximately 20% of lung cancers are the most aggressive and fastest growing of all lung cancers. CPM are closely related to smoking, with only 1% of these tumors in non-smokers. SCLC spreads quickly to many places in the body and are most often discovered after they have spread widely. Referring to a specific cell appearance, often seen by examining the samples under a microscope SCLC, these cancers are sometimes called oat cell carcinoma.
NSCLC lung cancer the most frequent, representing approximately 80% of all lung cancers. NSCLC can be divided into three main types which are named according to the type of cells in the tumor as below :
- Adenocarcinomas
The adenocarcinomas are the most frequently observed in NSCLC in the U.S. and up to 50% of NSCLC. While adenocarcinomas are associated with smoking and lung cancer, this pattern is seen both in non-smokers who develop lung cancer. Most adenocarcinomas arise in areas outside the lungs or peripheral. Bronchioloalveolar carcinoma is a subtype of adenocarcinoma, which often takes place at several sites in the lungs and spreads along the preexisting alveolar walls.
- Squamous cell carcinoma
Squamous cell carcinoma were once more common than adenocarcinomas, currently representing around 30% of NSCLC. Also known as squamous cell carcinoma, squamous cell carcinoma are more common in the chest area in the central bronchi.
- The large cell carcinomas
Large cell carcinomas sometimes referred to as undifferentiated carcinomas, are the most common NSCLC low.
- Mixtures of different types of NSCLC are also seen.
Other cancers types may arise in the lung and these guys are much less common than NSCLC and SCLC, and together represent only 5% -10% of lung cancers :
- Bronchial carcinoids make up approximately 5% of lung cancers. These tumors are usually small (3-4 cm or less) when diagnosed and occur more frequently in people younger than 40 years. Non-smoking, carcinoid tumors can metastasize, and a small proportion of these tumors secrete hormones and substances that can cause specific symptoms related to the hormone produced. Carcinoids and dissemination in general, grow more slowly than lung cancer, and many are detected early enough to be amenable to surgical resection.
- Cancers of the supporting tissues of the lung, such as vascular smooth muscle or blood cells involved in immune response may occur rarely in the lungs.
As mentioned above, metastatic tumors in the major organs are often in the lungs. Tumors anywhere in the body can spread to the lungs, either by blood through the lymphatic system or directly to nearby organs. Metastatic tumors are more often multiple, scattered throughout the lung, and is concentrated in peripheral regions rather than the central regions of the lung.