Lung Carcinoid Tumor also called lung neuroendocrine tumors because it is made up of neuroendocrine cells; is a slow-growing uncommon tumor and less than 5% lung cancer patients are affected from this. Neuroendocrine cells found in all body and are similar to endocrine cells because both produce hormones or hormone-like substances. Sometime these cells grow faster and turn into tumor known as a carcinoid tumor. This carcinoid tumor also found in other part of body, 3 out 10 carcinoid tumor are found in lungs.
There is no such cause of lung carcinoid tumor and not seems to be related to smoking, air pollutants, or other chemicals but researchers have learned about the risk factor of cancer-causing chemicals or radiation can cause changes in lung cells that lead to carcinomas tumor. Although, these factors are not play a big role in the development of lung carcinoid tumors. People with a rare inherited disorder called multiple endocrine neoplasia type 1 (MEN1) are maybe at higher risk for lung carcinoids tumor.
Carcinoid tumors possibly grow from tiny knots of neuroendocrine cells called carcinoid tumorlets in the lung windpipe. There are two kinds of lung carcinoid tumor:
Type1: Typical carcinoids present in 9 out of 10 lung carcinoids patients. They grow slowly and rarely spread outside the lungs.
Type2: Atypical carcinoids are very rear than typical carcinoids tumor. They develop faster than typical carcinoids tumor and there is a greater chance of spreading outside of lungs. These cells have more division than typical carcinoid tumor.
Lung carcinoid tumor is also classified by their location:
Central Carcinoids Tumor: found near the middle of the lungs walls of the large windpipe.
Peripheral Carcinoids Tumor: found closer to the edges of the lungs in the narrower windpipe.
Lung carcinoids tumor have no such symptom or signs, only the patients are detected with this type of cancer when they tested for other illness like chest x-ray for lung infection. While the tumor grows too big then carcinoid tumor may show the symptoms like:
- Facial flushing (warmth) and redness
- Wheezing or asthma-like symptoms
- Shortness of breath
- High blood pressure
- Weight gain
- Increased amount of body and facial hair (hirsutism)
- Coughing with blood.
But these above symptoms shown when tumor grows and there is very rear chance of showing symptoms.
Diagnoses of lung carcinoid tumors only when doctor ask your medical history and he suspects that there is a problem with your lungs, he ask you for more test and these tests diagnose your cancer.