Large Cell Lung Cancer Stage IV

Stage IV large cell lung cancer represents the most advanced form of this rare type of lung cancer, where the disease has spread beyond the lungs to other parts of the body. While this diagnosis presents significant challenges, modern treatments are helping patients live longer and better quality lives.

Table of contents

• What is Large Cell Lung Cancer?
• Understanding Stage 4 Large Cell Lung Cancer
• Symptoms of Stage 4 Disease
• How the Disease is Diagnosed
• Treatment Options
• Outlook and Survival

What is Large Cell Lung Cancer?

Large cell lung cancer is one of the least common types of lung cancer. It is a form of non-small cell lung cancer (NSCLC), which is a broad category that includes most lung cancers. Within this category, there are three main types: adenocarcinoma (cancer that begins in glandular cells on the outer part of the lungs), squamous cell carcinoma (cancer that begins in the thin, flat cells lining the airways), and large cell carcinoma.^[1]

Large cell carcinoma begins in the cells that make up the outer lining of the lungs. It accounts for about 1 in 10 cases of all lung cancers, making it the rarest of the three main non-small cell lung cancer types.^[1] Under a microscope, the cancer cells appear larger than those seen in small cell lung cancer, which is how the disease gets its name.^[1]

Like other forms of lung cancer, large cell carcinoma can develop if you were exposed to substances that cause cancer. Smoking cigarettes remains the biggest cause of large cell lung cancer and other types of non-small cell lung cancer. However, exposure to asbestos fibers can also cause large cell carcinoma 10 to 50 years after exposure. Other possible causes include radon gas, secondhand smoke, arsenic, and air pollution.^[4]

Understanding Stage 4 Large Cell Lung Cancer

Stage 4 lung cancer means the cancer has spread beyond the lungs to other parts of the body. This is also called advanced lung cancer or metastatic lung cancer (meaning the cancer has spread).^[2] When large cell lung cancer reaches stage 4, tumors may be found in various locations throughout the body.

Stage 4 can be divided into two sub-stages: 4A and 4B. In stage 4A, the cancer can be any size and might have grown into nearby structures. It might have spread to nearby lymph nodes. Additionally, it has spread to the other lung, is present in the layers covering the lung (the pleura) or heart (pericardium), or there are cancer cells in the fluid between the two layers covering the lung or heart. Stage 4A can also mean there is a single area of cancer that has spread outside the chest to a distant lymph node or to an organ such as the liver, bones, or brain.^[2]

In stage 4B, the cancer can be any size and might have grown into nearby structures. It might have spread to nearby lymph nodes, and it has spread to several areas outside the chest such as distant lymph nodes or other organs, or both.^[2] Stage 4 lung cancer tumors commonly spread to the adrenal glands, bones, both lungs, brain, and liver.^[11]

Symptoms of Stage 4 Disease

While there are typically little to no symptoms in the early stages of lung cancer, patients often experience uncomfortable symptoms by stage 4.^[11] Common symptoms include a cough that won’t go away, appetite loss, bone pain, chest pain, and coughing up blood. Patients may also experience droopy eyelids, fatigue, fluid buildup in the lung lining (a condition called pleural effusion), muscle weakness, shortness of breath, swelling in lymph nodes, and weight loss.^[11]

When the cancer spreads to other parts of the body, additional symptoms may develop. Stage 4 lung cancer patients may suffer from headaches, dizziness, or numb limbs due to brain metastasis (spread to the brain). They may develop jaundice, which is yellowing of the skin or eyes, if the tumors reach the liver and prevent it from functioning normally.^[11]

How the Disease is Diagnosed

A diagnosis of large cell carcinoma is usually made after a biopsy of the lung tissue. A biopsy is a procedure in which tissue samples are removed from the body so that they can be viewed under a microscope by a pathologist to check for cancer cells. The pathologist will look at the tissue under a microscope and check for cancer cells. The pathologist will also check for certain features that are typical of large cell carcinoma.^[1]

Before a biopsy, doctors typically use imaging tests to look at the lungs and identify suspicious areas. These tests can show the location and size of the lung cancer. Tests might include X-ray, MRI, CT (computed tomography), and positron emission tomography, which is also called a PET scan.^[8] If you are coughing up sputum (the mucus that is coughed up from the lungs), it can be looked at under a microscope, as the sputum can sometimes show lung cancer cells.^[8]

Treatment Options

The aim of treatment for stage 4 lung cancer is to control the cancer and help to reduce the symptoms.^[2] Treatment depends on what type of lung cancer you have, where it has spread, and your overall health. The treatment for small cell lung cancer is different from the treatment for non-small cell lung cancer, including large cell carcinoma.^[2]

If you are well enough, you might have several different types of treatment. These may include targeted cancer drugs, immunotherapy (treatments that help your own immune system eliminate or control cancer), chemotherapy with immunotherapy, or chemotherapy alone. Some patients may receive stereotactic radiosurgery on any cancer left behind, or brain stereotactic radiosurgery or whole brain radiotherapy for brain metastases.^[2]

To control symptoms, you might also have one or more of these treatments: external radiotherapy (radiation from outside the body), internal radiotherapy called brachytherapy, laser treatment, freezing the tumor (cryotherapy), a rigid tube called a stent to keep the airway open, or a stent to keep a big vein called the superior vena cava open.^[2]

According to the Cancer Research Institute, immunotherapy for lung cancer, alone or in combination with conventional treatments, can significantly improve outcomes for patients. Several immunotherapy drugs have been approved for treating lung cancer patients. These include checkpoint inhibitors that target specific pathways in the immune system to help it recognize and attack cancer cells.^[12]

Outlook and Survival

The average life expectancy for large cell lung cancer is 35 months, or around 3 years, with some patients becoming long-term survivors.^[4] It’s important to understand that these are general statistics, and individual outcomes can vary widely based on many factors including overall health, response to treatment, and specific characteristics of the cancer.

While stage 4 lung cancer is more challenging to treat than earlier stages due to the spread of cancer, long-term survival may still be possible by getting top treatments from skilled doctors.^[11] Research shows that stage 4 lung cancer can sometimes be managed for extended periods, and in some cases, patients have achieved remarkable outcomes. According to a published case report, the standard management of stage 4 lung cancer is typically with palliative intent, but there have been documented cases of patients with advanced disease achieving long-term survival with appropriate treatment.^[9]

Advances in treatments, particularly immunotherapy and targeted therapies, have caused a significant decline in lung cancer deaths in recent years.^[5] Clinical trials testing new medications may also be an option for some patients, potentially providing access to cutting-edge treatments not yet widely available.^[20]