Stage 4 squamous cell carcinoma (SCC) means the cancer has spread (metastasized) beyond the skin to distant lymph nodes, bones, or other organs, so it doesn't just look like a skin sore but involves systemic symptoms like fatigue, unexplained weight loss, or coughing, alongside potentially large, fixed lymph nodes or masses in other areas, though the original skin lesion could still appear as a non-healing sore, scaly patch, or rapidly growing lump.
Stage 4 squamous cell carcinoma
In stage 4, the cancer can be any size and has spread (metastasized) to one or more lymph nodes which are larger than 3 cm and may have spread to bones or other organs in the body.
Squamous cell lung cancer, also called squamous cell carcinoma of the lung, accounts for about 30% of all lung cancers. It's a type of non-small cell lung cancer (NSCLC) that typically is treated using one or more types of therapy—surgery, radiation, chemotherapy, angiogenesis inhibitors, or immunotherapy.
Squamous Cell Carcinoma Treatment
HNSCC can spread (metastasize ) to other parts of the body, such as the lymph nodes or lungs. If it spreads, the cancer has a worse prognosis and can be fatal. About half of affected individuals survive more than five years after diagnosis.
Surgical excision for squamous cell carcinoma treatment
The most common procedure for treating SCC, surgical excision involves carefully removing the lesion along with a slim margin of surrounding healthy tissue. The excised tissue is then microscopically examined by a pathologist, who can identify cancer cells.
Even in stage IV, radiation therapy may be necessary for palliations in cases where cancer has spread to other organs, such as the brain, liver, lungs, or bones.
Squamous cell carcinomas appear as red scaly patches, scaly bumps, or open sores. Left alone, they become larger and destroy tissue on the skin. They can also spread to other areas of the body.
Treatment overview
In July 2021, the FDA expanded this approval to include SCC that is locally advanced and not curable by radiation or surgery. In 2024, the FDA approved cosibelimab-ipdl (UnloxcytTM) for adults with locally advanced or metastatic squamous cell carcinoma that is not curable with surgery or radiation.
If you've been diagnosed with advanced squamous cell skin cancer, you will be cared for by a team of medical professionals. This team will include oncologists (cancer doctors).
High-risk human papillomavirus (HR HPV) is associated with oropharyngeal squamous cell carcinoma (OPSCC), which is rising.
Stage 4: End-of-life care begins
Stage 4 is when end-of-life care begins. The focus shifts to making you as comfortable as possible in the final phase of life, while also offering emotional and spiritual support for you and your loved ones.
Squamous cell carcinoma of the lung, also known as squamous cell lung cancer, is a type of nonsmall cell lung cancer (NSCLC). Squamous cell lung tumors often occur in the central part of the lung or the main airway, such as the left or right bronchus.
Metastatic squamous neck cancer with occult primary is a disease in which squamous cell cancer spreads to lymph nodes in the neck and it is not known where the cancer first formed in the body. Signs and symptoms of metastatic squamous neck cancer with occult primary include a lump or pain in the neck or throat.
Healthcare providers use stages of cancer to diagnose disease, make treatment plans and collaborate with other cancer specialists. They base cancer staging on different factors, like tumor size, location and whether cancer cells have spread to other areas of your body.
Mohs Surgery
Mohs micrographic surgery is considered the gold standard for SCC treatment. This is especially the case for lesions on cosmetically sensitive areas like the face, neck, and hands. It involves removing the cancer layer by layer while examining each layer under a microscope.
UV radiation from the sun increases the risk of squamous cell carcinoma of the skin. Covering the skin with clothes or sunblock can help lower the risk. Using tanning beds. People who use indoor tanning beds have an increased risk of squamous cell carcinoma of the skin.
A high-risk SCC is considered when the diameter of the tumor is larger than 2 cm as tumors of this size double the risk of SCC recurrence and triple the rate of metastasis compared to the smaller lesion. Therefore, a larger margin for excision is required on the high-risk SCC.
For a patient with stage IV cancer, age must also be considered to prognose survival. For a patient who is 67 years or older, the expected median survival is a little more than 1 year. If this patient were younger than 67 years, then the expected median survival would be about 2 years.
Signs and symptoms of squamous cell skin cancer
They can also develop in scars or skin sores elsewhere. These cancers can appear as: Rough or scaly red (or darker) patches, which might crust or bleed. Raised growths or lumps, sometimes with a lower area in the center.
Aggressive squamous cell carcinoma refers to a form of skin cancer that tends to grow faster, penetrate deeper into the skin, and has a higher likelihood of spreading to lymph nodes or distant organs compared to typical SCC.
Radiation therapy and chemo are often combined to treat cancer. While both treatments are effective, chemo generally produces more serious side effects than radiation therapy. How radiation therapy is used to treat cancer. American Cancer Society.
For example, the following tissues and organs are listed from most radiosensitive to least radiosensitive:
Stage 4 cancer is challenging to treat, but treatment options may help control the cancer and improve pain, other symptoms and quality of life. Systemic drug treatments, such as targeted therapy or chemotherapy, are common for stage 4 cancers.