Squamous cell skin cancer (SCC) is a malignant neoplasm that develops from the squamous cells that make up the main layer of the epidermis of the skin. This disease is often associated with prolonged exposure to ultraviolet radiation, making it especially common among people with fair skin and those who work outdoors. SCC can appear as ulcers, rough or slightly raised skin lesions that may bleed or become inflamed. If not treated promptly, there is a risk of metastasis to regional lymph nodes and other organs, which significantly worsens the prognosis for the patient.
History of the disease and interesting historical facts
Squamous cell skin cancer is one of the most studied forms of skin cancer, and its history spans many centuries. The first mentions of skin tumors resembling squamous cell carcinoma can be found in medical texts of Ancient Egypt. However, the systematic description and classification of this disease began only in the 19th century. In 1806, the Swiss physician Johann Friedrich Collier first described squamous cell carcinoma as a separate nosological entity. Interestingly, at the beginning of the 20th century, squamous cell skin cancer was considered primarily a surgical problem, and the study of other treatment methods, such as radiotherapy and chemotherapy, became relevant only in the middle of the century. Modern diagnostic and treatment methods are based on previous achievements, which allows doctors to cope with this pathology more effectively.
Epidemiology
Squamous cell skin cancer is one of the most common types of malignant neoplasms. According to statistics, the incidence of squamous cell skin cancer is constantly increasing in the world, which is associated with lifestyle changes and improved diagnostics. In countries with high levels of solar activity, such as Australia and the United States, the subtlety of Ultradermatology. In 2020, more than 200,000 new cases of squamous cell skin cancer were registered in the United States, according to the American Cancer Society, which is about 20% of all skin cancer cases. The incidence also increases with age, with the highest concentration of cases in people over 50 years of age. It is also important to note that men are almost twice as likely to develop squamous cell skin cancer as women.
Genetic predisposition to this disease
Genetic predisposition to squamous cell skin cancer is a subject of active research. Some mutations in genes responsible for DNA repair may contribute to the development of this disease. For example, mutations in the TP53 and RAS genes may play a key role in carcinogenesis. One of the significant mechanisms that leads to cancerous changes is the accumulation of mutations as a result of exposure to ultraviolet radiation, which leads to damage to the genetic material of cells. Studies show that having close relatives diagnosed with squamous cell skin cancer increases the risk of the disease in individuals. Thus, genetic factors in combination with exogenous influences can significantly affect the likelihood of developing squamous cell carcinoma.
Risk factors for the development of this disease
Risk factors that contribute to the development of squamous cell skin cancer can be divided into physical and chemical. Physical factors include:
- Long-term exposure to solar ultraviolet radiation.
- Individual predisposition (fair skin, red or blond hair).
- Age-related changes associated with the passage of time and the accumulation of damage to the skin.
Chemical risk factors include:
- Exposure to carcinogenic substances such as arsenic and some skin antiseptics.
- Treatment of the skin with certain medications, such as photosensitizing drugs.
- Lifestyle (smoking, drinking alcohol) can also increase the risk.
Certain health conditions, such as systemic dermatitis or chronic ulcers, may also contribute to the development of squamous cell skin cancer.
Diagnosis of this disease
Diagnosis of squamous cell skin cancer usually begins with a clinical examination. The main symptoms that may indicate this disease include:
- A new sore or rough patch on the skin that does not heal.
- Changing the characteristics of existing moles.
- Bleeding or inflammation of the skin in the area of the suspicious areas.
Laboratory tests may include a biopsy of the affected skin, which allows a definitive diagnosis. Radiological examinations are usually performed in cases of suspected metastasis, to evaluate the lymph nodes and other organs. Differential diagnosis is important to exclude other skin diseases, such as basal cell carcinoma, psoriasis, or eczema.
Treatment
Treatment for squamous cell skin cancer depends on the stage of the disease and may include the following methods:
- General treatment: enhancing the body's immune response through immunotherapy using interferons.
- Pharmacological treatment: use of local chemotherapeutic drugs such as 5-fluorouracil.
- Surgical treatment: tumor excision followed by plastic surgery or cryodestruction.
- Other treatments include photodynamic therapy and radiotherapy in advanced cases.
Combination techniques often produce better results and reduce the likelihood of relapse.
List of medications used to treat this disease
Among the drugs used to treat squamous cell skin cancer are:
- 5-fluorouracil (local chemotherapy).
- Imiquimod (immunostimulant).
- Doxorubicin (in case of systemic treatment).
- Local steroids to reduce inflammatory changes.
It is important to remember that the choice of a specific drug depends on the individual characteristics of the patient and the stage of the disease.
Disease monitoring
Monitoring squamous cell skin cancer involves regular dermatologist checkups as well as treatment follow-ups. Typical recommendations are as follows:
- Periodic skin examinations - every 3-6 months in the first year after treatment.
- Additional tests as needed, including imaging of lymph nodes and organs.
- Evaluation of recurrence and complications such as lymphedema or metastases.
The prognosis for patients with squamous cell skin cancer depends on the extent of the disease and the stage at diagnosis. Complications can include both physical and psychological aspects, requiring a comprehensive approach to treatment.
Age-related features of the disease
Squamous cell skin cancer can manifest itself differently depending on the age group. In older people, the disease is more common against the background of age-related skin changes and chronic diseases. In young people, on the contrary, skin cancer can develop as a result of intense tanning or the use of solariums, which is often a consequence of fashion or improper skin care. It is important to note that squamous cell skin cancer is much less common in children and adolescents, but even in this group it can develop against the background of immunosuppression (for example, in patients with organ transplants).
Questions and Answers
- What are the main causes of squamous cell skin cancer? The main causes are long-term exposure to ultraviolet radiation, genetic predisposition and the presence of chronic skin diseases.
- Can squamous cell skin cancer be prevented? Yes, you can reduce your risk by avoiding sun exposure, using sunscreens, and getting regular checkups with a dermatologist.
- How is squamous cell skin cancer diagnosed? The main diagnostic methods are clinical examination, biopsy of damaged tissue and radiological studies to assess metastases.
- Which treatment is most effective? Treatment depends on the stage of the cancer, but surgery is often the mainstay of treatment in early-stage disease.
- What is the prognosis for squamous cell skin cancer? The prognosis is favorable with early diagnosis and adequate treatment; early stages have a high chance of full recovery.
