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The development of lip cancer is not the result of a single cause, but rather the result of a combination of several adverse factors that lead to damage to epithelial cells and their malignant transformation. Understanding these risk factors allows you to prioritize your treatment and take timely preventative measures.
It is important to understand that the presence of one or even several risk factors does not necessarily mean the development of the disease, but it indicates the need for a more attentive attitude to one’s health and regular preventive examinations.
Lip cancer rarely occurs in completely healthy tissue. In most cases, it is preceded by so-called precancerous conditions—chronic diseases and changes in the mucous membrane or vermilion border of the lips—that have a high risk of developing into a malignant tumor.
Early signs:
Late symptoms:
To determine treatment strategies and prognosis, doctors use a unified classification system that takes into account the tumor structure and its extent within the body.
About 95% of all malignant tumors of the lip are squamous cell carcinoma, which originates from the cells of the stratified squamous epithelium of the red border. Within this type, two main types are distinguished:
Diagnosing lip cancer is always a comprehensive approach aimed not only at confirming the malignant nature of the tumor, but also at accurately determining the extent of its spread.
Primary diagnostic methods include examination and palpation. The doctor evaluates the condition of the vermilion border of the lips, paying particular attention to:
By palpation, the doctor determines the tumor's density, its mobility relative to the underlying tissue, and tenderness. They also carefully palpate the submental, submandibular, parotid, and cervical lymph nodes.
Next, the patient with suspected cancer undergoes a biopsy followed by histological examination. This is the only method that can confirm or refute the diagnosis with 100% accuracy.
Under local anesthesia, the doctor completely excises or removes a tissue core from the most suspicious area with a special instrument, including some healthy tissue. The resulting sample is sent to the laboratory, where it is processed, thinly sectioned, stained, and examined under a microscope. Histological examination allows us to determine and confirm:
To determine the stage of the disease, additional imaging techniques may be required, such as ultrasound, CT, MRI, and PET-CT. These allow for the assessment of lymph nodes and the detection of even distant metastases.
Lip cancer is a local manifestation of the oncological process, which, in the absence of timely treatment, poses a serious threat to life due to the ability to metastasize.
The treatment strategy is developed strictly on an individual basis and depends on the stage of the disease, the histological type of the tumor, its location, the patient's age, and the presence of comorbidities. The main principle is a comprehensive approach, often combining several methods to reduce the risk of recurrence.
Surgical removal of the tumor is the primary and most radical treatment for lip cancer, especially in the early stages. The goal is complete excision of the tumor within healthy tissue.
Types of operations:
This method uses high-energy radiation to disrupt the DNA of cancer cells and destroy them. It can be used alone or in combination with surgery. It is typically prescribed after surgery to destroy any remaining cancer cells, reduce the risk of recurrence, and in the presence of unfavorable factors.
Types of radiation therapy:
This type of conservative therapy involves the use of cytostatic drugs that destroy rapidly dividing cells or stop their growth. It is rarely used as a stand-alone treatment for lip cancer.
Chemotherapy is used in combination with radiation therapy for locally advanced, inoperable tumors. Chemotherapy drugs increase the sensitivity of cancer cells to radiation, which increases the effectiveness of treatment.
In metastatic and recurrent cancer, this type of treatment is used systemically to control the spread of the disease, reduce the size of metastases and relieve symptoms.
This is a modern treatment method that uses specialized drugs that target specific molecular targets present in cancer cells and drive their growth. Most often, targeted drugs act on the epidermal growth factor receptor (EGFR), which is expressed in many squamous cell carcinomas of the head and neck. They block the signals that trigger tumor growth.
Targeted therapy is used for metastatic cancer that is resistant to standard chemotherapy. It is usually used in combination with chemotherapy or radiation therapy.
This is the most advanced method that doesn't attack the tumor directly. Atypical cells are targeted through the patient's own immune system. It is activated by specialized drugs, allowing the body to recognize and destroy cancer cells.
Checkpoint inhibitors—monoclonal antibodies that block the PD-1/PD-L1 proteins—are used for treatment. These proteins help the tumor camouflage itself from immune T cells. Immunotherapy is prescribed to patients with recurrent or metastatic lip cancer when previous treatment has been ineffective.
In the later stages, when multiple distant metastases form and radical treatment is not feasible, the main goal of therapy becomes not fighting the disease, but maintaining the patient's quality of life and alleviating symptoms.
Palliative care includes:
After resection of small tumors, the scar is virtually invisible, as surgeons place incisions along the natural contours of the lip. After extensive surgeries, lip restoration is performed immediately using reconstructive plastic surgery techniques. Although swelling and a scar will remain immediately after surgery, the appearance will improve significantly over time.
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General characteristics of the disease
A malignant tumor characteristic of lip cancer, it is usually formed predominantly by cells of the stratified squamous epithelium. Contrary to its common name, in the vast majority of cases (approximately 95%), the disease affects the lower lip. The upper lip and corners of the mouth are affected significantly less frequently, due to anatomical and functional differences. The lower lip is more susceptible to the negative impact of external factors.
The pathogenesis of the disease is based on the process of malignant transformation of normal cells. Under prolonged exposure to adverse factors, various mutations occur in their DNA. Damage to the genome leads to uncontrolled cell division, loss of normal cell functions, and the ability to undergo apoptosis—programmed cell death that acts as a protective mechanism. Gradually, a tumor nodule forms, which invades surrounding tissue and can metastasize—spread through the lymphatic and blood vessels. The submandibular and submandibular lymph nodes are typically the first to be affected.
From an epidemiological perspective, lip cancer is considered a disease of older men. They suffer from this pathology 3-7 times more often than women. The peak incidence occurs in the age group over 60-70 years.
Experts attribute this to the higher prevalence of risk factors among men, such as smoking, outdoor work, and alcohol abuse. However, recently, there has been a trend toward younger age groups and an increase in cases among women, which is explained by changing behavioral habits, including the rise in female smoking and the popularity of indoor tanning.