Front Desk: 469-391-0070
Squamous Cell Carcinoma: Causes, Symptoms & Treatment Options
Introduction
Squamous cell carcinoma (SCC) is one of the most common forms of skin cancer, affecting millions of people worldwide each year. It develops in squamous cells, which are thin, flat cells located in the outermost layer of the skin, known as the epidermis. While SCC is often highly treatable when identified early, it can become life-threatening if left untreated, as it has the potential to spread to other parts of the body. This article offers a detailed overview of SCC, including its causes, symptoms, diagnostic methods, treatment options, and strategies for managing the condition at home. Whether you’ve recently been diagnosed or are simply seeking to learn more, our aim is to provide you with the information needed to make confident and informed decisions about your health.
What is Squamous Cell Carcinoma?
Squamous cell carcinoma is a type of skin cancer that arises due to a combination of risk factors, including lifestyle habits, underlying medical conditions, genetic predisposition, and age. It is typically characterized by symptoms such as scaly patches, persistent sores, or wart-like growths. Diagnosis is confirmed through clinical examinations and biopsies. Treatment options vary and may include medications, surgical procedures, and at-home care strategies tailored to the individual’s needs.
Understanding Squamous Cell Carcinoma
Squamous cell carcinoma (SCC) is a form of skin cancer that originates in squamous cells, which make up the middle and outer layers of the skin. These cells serve an essential function by protecting the body from environmental damage. However, prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds can damage the DNA within these cells, triggering abnormal growth and the development of cancer.
SCC often presents as a small, scaly patch of skin, a sore that fails to heal, or a wart-like growth. If left untreated, it can penetrate deeper layers of the skin and spread to nearby tissues, lymph nodes, or even other organs, making treatment more complex. While SCC is generally less aggressive than melanoma, another form of skin cancer, it is more invasive than basal cell carcinoma and requires prompt medical attention.
According to the Skin Cancer Foundation, SCC is the second most common type of skin cancer in the United States, with over 1 million cases diagnosed annually. It is particularly prevalent among individuals over the age of 50, especially those with fair skin, a history of significant sun exposure, or a weakened immune system. Despite its high incidence, SCC has an excellent prognosis when detected early, with cure rates exceeding 90% when treated appropriately.
Risk Factors for Squamous Cell Carcinoma
Lifestyle Risk Factors
Certain lifestyle choices can significantly increase the likelihood of developing SCC. Prolonged exposure to UV radiation, whether from the sun or artificial sources like tanning beds, is the leading cause. Individuals who spend extended periods outdoors without adequate sun protection—such as sunscreen, wide-brimmed hats, or protective clothing—are at heightened risk. Smoking is another contributing factor, particularly for SCCs that develop on the lips or inside the mouth. Additionally, exposure to carcinogenic substances, such as arsenic or industrial chemicals, can further elevate the risk.
Medical Risk Factors
Several medical conditions and treatments can predispose individuals to SCC. A weakened immune system, whether due to illnesses like HIV/AIDS or medications such as immunosuppressants used after organ transplantation, increases vulnerability. Chronic skin conditions, including psoriasis or eczema, may also heighten the risk, particularly if treated with UV light therapy. Previous skin injuries, burns, or scars can serve as sites for SCC development. Furthermore, a history of other skin cancers, such as basal cell carcinoma or melanoma, may increase the likelihood of developing SCC.
Genetic and Age-Related Risk Factors
Genetics and age also play a significant role in SCC risk. Individuals with fair skin, light-colored eyes, and blond or red hair are more susceptible due to lower levels of melanin, which provides some natural protection against UV radiation. A family history of skin cancer can further amplify this risk. Age is another critical factor, as SCC is more common in individuals over 50. This increased risk is likely due to cumulative sun exposure over a lifetime and the natural aging process, which reduces the skin’s ability to repair DNA damage effectively.
Signs and Symptoms of Squamous Cell Carcinoma
Non-Healing Sore
One of the earliest and most noticeable signs of SCC is a non-healing sore, which occurs in approximately 60% of cases. This refers to an open wound or lesion that does not improve over time or respond to standard treatments, such as topical ointments or antibiotics. SCC disrupts the normal growth and repair of skin cells, leading to these persistent lesions. Non-healing sores are most commonly found in sun-exposed areas, including the face, ears, neck, and hands. Individuals with fair skin or a history of excessive sun exposure are particularly vulnerable.
Scaly Patch
Scaly patches are observed in about 40% of SCC cases. These patches are rough, raised, and may appear red or brown. They result from abnormal keratin production caused by cancerous cells in the epidermis. Keratin, a protein that forms the outer layer of the skin, is overproduced in these areas, leading to the characteristic scaly texture. These patches often develop in areas of chronic sun damage and are sometimes mistaken for benign conditions like eczema or psoriasis, which can delay diagnosis.
Wart-Like Growth
Wart-like growths are present in approximately 20% of SCC cases. These growths resemble common warts but are typically harder, more irregular, and may bleed or become painful over time. They form as cancerous cells multiply uncontrollably, creating a mass that protrudes from the skin. Wart-like growths are more frequently seen in advanced stages of SCC and may indicate a more aggressive form of the disease. They are often found on the hands, feet, or genitals but can develop anywhere on the body.
Ulceration
Ulceration, or the formation of open sores, is seen in about 30% of SCC cases. These ulcers occur as cancer invades deeper layers of the skin, destroying healthy tissue. Ulceration is more common in advanced stages of SCC and may be accompanied by symptoms such as pain, bleeding, or infection. The edges of the ulcer are often raised and irregular, which can help distinguish SCC from other skin conditions.
Bleeding
Bleeding is reported in approximately 25% of SCC cases. It is often triggered by minor trauma to the affected area, as cancerous tissue tends to be more fragile and prone to injury. In advanced cases, bleeding may occur spontaneously if the tumor erodes nearby blood vessels. This symptom is particularly concerning as it may indicate deeper tissue involvement or a more aggressive tumor.
Crusting
Crusting is a common symptom in about 35% of SCC cases. It occurs when fluid or blood from the lesion dries, forming a hard layer on the surface. Crusting is often associated with ulceration and bleeding, making the lesion appear larger or more irregular. This symptom is frequently observed in lesions on the scalp, ears, and lips, where the skin is thinner and more susceptible to damage.
Red or Pink Bump
A red or pink bump is a hallmark feature of SCC, occurring in nearly 50% of cases. These bumps are firm, raised, and may have a central depression or crusted surface. They develop as cancerous cells form a mass that pushes outward through the skin. Red or pink bumps are more common in early-stage SCC and are often mistaken for benign conditions like acne or insect bites, which can delay diagnosis.
Thickened Skin
Thickened skin is observed in about 15% of SCC cases. This symptom occurs when cancerous cells stimulate the excessive production of keratin and connective tissue, resulting in a localized area of skin that feels hard or leathery. Thickened skin is more common in chronic cases or in areas subjected to repeated irritation or sun exposure, such as the hands and feet.
Pain
Pain is reported by approximately 20% of SCC patients, particularly in advanced stages. The pain is usually localized to the lesion and may worsen with touch or pressure. It occurs as the tumor invades deeper tissues, including nerves. Pain can also signal infection or inflammation in the affected area, requiring prompt medical evaluation.
Itching
Itching, or pruritus, affects about 10% of SCC patients. This symptom is caused by the release of inflammatory chemicals from cancerous cells, which irritate nerve endings in the skin. Itching is more common in early-stage SCC and may lead to scratching, which can worsen other symptoms such as bleeding or ulceration. Patients are advised to avoid scratching to prevent secondary infections.
Treatment Options for Squamous Cell Carcinoma
Medications for Squamous Cell Carcinoma
Cisplatin
Definition: Cisplatin is a chemotherapy drug that works by damaging the DNA of cancer cells, preventing them from dividing and growing. It is commonly used to treat various cancers, including squamous cell carcinoma (SCC).
How and When It’s Used: Administered intravenously in a clinical setting, cisplatin is often combined with other chemotherapy drugs or radiation therapy as part of a comprehensive treatment plan. It is typically a first-line option for advanced or metastatic SCC.
Expected Outcomes: Cisplatin can reduce tumor size and slow the progression of cancer, with noticeable results after several treatment cycles. However, side effects such as nausea and kidney toxicity are possible.
Carboplatin
Definition: Carboplatin is a chemotherapy drug similar to cisplatin but associated with fewer side effects. It works by interfering with the DNA of cancer cells to inhibit their growth.
How and When It’s Used: Often used as an alternative to cisplatin for patients who cannot tolerate its side effects, carboplatin is delivered intravenously and may be combined with other medications or radiation therapy.
Expected Outcomes: Carboplatin aims to shrink tumors and slow disease progression. It is generally well-tolerated, though side effects such as fatigue and mild changes in blood counts may occur.
Doxorubicin
Definition: Doxorubicin is a chemotherapy drug that disrupts DNA replication in rapidly dividing cancer cells, effectively slowing their growth.
How and When It’s Used: This medication is typically reserved for aggressive or advanced SCC cases. It is administered intravenously, often in combination with other chemotherapy agents.
Expected Outcomes: Doxorubicin can lead to significant tumor shrinkage, though results may take several weeks. Common side effects include hair loss, nausea, and potential heart-related complications.
5-Fluorouracil (5-FU)
Definition: 5-Fluorouracil is a chemotherapy drug that interferes with DNA and RNA synthesis in cancer cells, slowing their growth. It can be applied topically or used systemically.
How and When It’s Used: Topical 5-FU is used for superficial SCC or precancerous lesions, while systemic use is reserved for more advanced cases. The method of application depends on the depth and spread of the cancer.
Expected Outcomes: Topical use can clear superficial lesions over several weeks, while systemic use helps reduce tumor size in advanced cases. Side effects may include skin irritation or gastrointestinal discomfort.
Methotrexate
Definition: Methotrexate is a chemotherapy drug that inhibits cancer cell growth by targeting their DNA replication process.
How and When It’s Used: Typically reserved for cases where other treatments are unsuitable, methotrexate can be administered orally or via injection.
Expected Outcomes: Methotrexate can slow disease progression and shrink tumors, though noticeable effects may take several weeks. Side effects include fatigue and potential liver toxicity.
Pembrolizumab
Definition: Pembrolizumab is an immunotherapy drug that helps the immune system recognize and attack cancer cells by targeting the PD-1 protein.
How and When It’s Used: Used for advanced or metastatic SCC, particularly in patients who do not respond to chemotherapy, pembrolizumab is administered intravenously every few weeks.
Expected Outcomes: Pembrolizumab can provide long-term tumor control and, in some cases, complete remission. Results may take months to become evident.
Nivolumab
Definition: Nivolumab is another immunotherapy drug that blocks the PD-1 protein, enhancing the immune system’s ability to fight cancer.
How and When It’s Used: Similar to pembrolizumab, nivolumab is used for advanced SCC cases that are resistant to other treatments. It is delivered via intravenous infusion.
Expected Outcomes: Nivolumab may lead to tumor shrinkage and prolonged survival. Common side effects include fatigue and immune-related complications.
Cetuximab
Definition: Cetuximab is a targeted therapy that blocks the epidermal growth factor receptor (EGFR), which is often overexpressed in SCC.
How and When It’s Used: Cetuximab is used for advanced SCC, either alone or in combination with radiation therapy. It is administered intravenously.
Expected Outcomes: This treatment can slow tumor growth and improve survival rates. Side effects may include skin rash and infusion reactions.
Atezolizumab
Definition: Atezolizumab is an immunotherapy drug that targets the PD-L1 protein, helping the immune system attack cancer cells.
How and When It’s Used: Used for advanced or metastatic SCC, particularly when other treatments have failed, atezolizumab is administered via intravenous infusion.
Expected Outcomes: Atezolizumab can shrink tumors and improve survival. Side effects may include fatigue and immune-related complications.
Docetaxel
Definition: Docetaxel is a chemotherapy drug that disrupts the structure of cancer cells, preventing their division and spread.
How and When It’s Used: Used for advanced SCC, docetaxel is often combined with other chemotherapy agents and administered intravenously.
Expected Outcomes: Docetaxel can reduce tumor size and slow disease progression. Side effects may include hair loss and low blood cell counts.
Improving Squamous Cell Carcinoma Outcomes and Seeking Medical Help
Professional medical treatments are essential for managing squamous cell carcinoma, but certain lifestyle adjustments can complement these efforts. Protect your skin from excessive sun exposure by using sunscreen and wearing protective clothing. Keeping the affected area clean and moisturized can support healing, while a balanced diet rich in antioxidants and proper hydration promotes overall skin health. Avoiding smoking and alcohol can further reduce complications. However, these measures should only supplement—not replace—medical treatments.
If you notice new or changing skin lesions, persistent sores, or other concerning symptoms, seek medical attention promptly. Telemedicine offers a convenient way to consult healthcare providers from the comfort of your home. Our primary care practice specializes in telemedicine, providing expert guidance and treatment recommendations for squamous cell carcinoma.
Living with Squamous Cell Carcinoma: Tips for Better Quality of Life
Living with squamous cell carcinoma can be challenging, but there are strategies to maintain a good quality of life. Regular follow-ups with your healthcare provider are essential for monitoring your condition and adjusting treatments as needed. Managing side effects such as fatigue or skin irritation can improve daily comfort. Stress-reducing activities like yoga, meditation, or light exercise can enhance mental well-being. Joining a support group can provide emotional support and practical advice from others facing similar challenges. Staying informed about your condition and actively participating in your treatment plan empowers you to make the best decisions for your health.
Conclusion
Squamous cell carcinoma is a common but treatable form of skin cancer, especially when detected early. Understanding the available treatment options, from medications to lifestyle adjustments, helps you make informed decisions about your care. Early diagnosis and prompt treatment are crucial for achieving the best outcomes. If you have concerns about your skin or suspect squamous cell carcinoma, schedule a telemedicine consultation with our primary care practice. Our team is here to provide expert care and support, guiding you toward better health.
