Tumors of the lacrimal gland are pathological neoplasms arising from the epithelial or lymphoid tissue of the lacrimal gland. They can be both benign and malignant, accounting for about 5-8% of all orbital tumors. The most common are plasmacytomas, adenocarcinomas and lymphomas of the lacrimal gland. The anatomical location of the organ in the upper-outer part of the orbital cavity determines the characteristic clinical picture: exophthalmos with downward and inward deviation of the eyeball, double vision, limited mobility of the eyeball. It is important to note that the course of the disease directly depends on the histological type of the tumor and its biological activity.
History of the disease and interesting historical facts
The first documented description of lacrimal gland tumors dates back to the 18th century, when the French surgeon Jean Louis Petit described in detail the clinical manifestations of this disease. In 1945, Voigt first classified epithelial tumors of the lacrimal gland, dividing them into adenomas and adenocarcinomas. It is interesting to note that during World War II, there was an increase in the incidence of the disease, which is associated with the general deterioration of living conditions of the population. "The modern classification of tumors of the lacrimal gland was finally approved by the WHO only in 2000," the study in the Journal of Clinical Oncology notes.
Epidemiology (statistics of disease occurrence)
According to international registries, the incidence of primary tumors of the lacrimal gland is 0.3-0.6 cases per 1 million population per year. The average age of patients at initial diagnosis ranges from 35 to 55 years. The ratio of men to women is approximately 1:1.2. Statistical analysis shows:
- Benign tumors account for 45-50% cases
- Malignant neoplasms - 50-55%
- The highest incidence rate is observed in developed countries.
Genetic predisposition to the disease (involved genes and mutations)
Recent studies have identified a number of genetic markers associated with the development of lacrimal gland tumors. Mutations in the TP53, RB1, and PTEN genes are observed in 30-40% cases of malignant neoplasms. Polymorphisms of the CYP1A1 and GSTM1 detoxification genes increase the risk of developing the disease by 25-30%. “A special role is played by mutations in the MYC gene, which are found in almost all patients with aggressive forms of the disease,” the Cancer Research Institute report states.
Risk factors for the development of this disease
The main risk factors include:
- Ionizing radiation
- Professional contact with organic solvents
- Chronic inflammatory processes in the lacrimal gland area
- Hereditary predisposition
- Age over 40 years
It is important to note that smoking and alcohol do not have a statistically significant relationship with the development of this pathology.
Diagnosis of this disease
The main symptoms include exophthalmos with characteristic displacement of the eyeball, double vision, pain in the upper-outer quadrant of the orbit. The diagnostic algorithm includes:
- CT and MRI of the orbit
- Ultrasound examination
- Biopsy with histological examination
- Immunohistochemical study
Differential diagnosis is carried out with inflammatory processes, metastatic lesions and other orbital tumors.
Treatment
The therapeutic tactics depend on the histological type of tumor:
- Surgical removal with wide resection margins
- Adjuvant radiotherapy
- Chemotherapy for malignant forms
- Targeted therapy in the presence of specific mutations
The combined approach shows better results in terms of five-year survival.
List of drugs used to treat this disease
Main groups of drugs:
- Cisplatin
- Doxorubicin
- Paclitaxel
- Targeted inhibitors (eg, Imatinib)
- Glucocorticoids
The choice of a specific drug depends on the molecular genetic profile of the tumor.
Disease monitoring
Routine monitoring includes regular check-ups every 3-6 months in the first year after treatment. The prognosis depends on the stage of the disease and the histological type of the tumor. The five-year survival rate for benign tumors reaches 95%, for malignant tumors - 60-70%. The main complications include relapses, damage to the extraocular muscles and optic neuritis.
Age-related features of the disease
In childhood, lymphoproliferative processes predominate, while in adults, epithelial tumors are more common. In elderly patients, the disease has a more aggressive course with rapid progression. Adolescence is characterized by high sensitivity to radiotherapy, which requires dose adjustment.
Questions and Answers
- What are the first signs that should alert you? Exophthalmos with characteristic displacement of the eyeball, double vision, swelling in the area of the upper outer quadrant of the orbit.
- How dangerous is the operation? Modern techniques allow us to minimize risks, but there is a risk of damage to the oculomotor muscles.
- Is it possible to completely cure the disease? With timely diagnosis and adequate treatment, the prognosis is favorable, especially for benign tumors.
Advice from Dr. Oleg Korzhikov
"Patients often ask me about the need for an MRI scan if they suspect a tumor of the lacrimal gland. I always explain that this examination is extremely important for an accurate diagnosis. Many are also interested in the possibility of preserving vision - with modern treatment methods, we can minimize the risk of losing it. It is important to remember that early medical attention significantly increases the chances of successful treatment."
