Familial Wilms tumor (FWT) is a rare type of kidney tumor that most often occurs in childhood. It arises from undifferentiated progenitor cells of the metanephros, which leads to the formation of abnormal structures in the kidneys. In most cases, the disease is diagnosed in children under 5 years of age, but in some cases, it can recur in older children up to 15 years of age. FWT is considered an inherited form of Wilms tumor, which is associated with genetic mutations and systemic diseases such as Williams syndrome and Bloom syndrome. The effectiveness of treatment is significantly increased with early diagnosis and a comprehensive approach, including surgical removal of the tumor and chemotherapy.
History of the disease and interesting historical facts
Familial Wilms tumor was first described in 1899 by German physician Walter Wilms. He noted that the tumor was characteristic of childhood and could manifest as a single or multiple neoplasms in the kidneys. In his early observations, Wilms also noted the presence of various developmental anomalies associated with the disease. In the 1970s, the first attempts were made to link the tumor to specific genetic mutations, which gave rise to modern research in the field of oncogenetics. In the 1990s, it was established that the tumor can occur in both kidneys at once and is associated with other hereditary syndromes. Interestingly, FWT is quite common in African and Asian populations, indicating possible genetic and environmental factors in the development of the disease.
Epidemiology
Familial Wilms tumor is one of the most common childhood renal tumors, accounting for approximately 5% of all childhood tumor cases. The incidence is estimated to be about 1-2 cases per 100,000 children under 15 years of age. Familial cases are highly prevalent among patients with FAWS, accounting for up to 15-20% of the total. There are notable differences in prevalence between ethnic and geographic groups: for example, the disease is more common in African American children than in children of other racial groups.
Genetic predisposition to this disease
Familial Wilms tumor is associated with certain genetic mutations that may be inherited from parents. Key genes involved in the development of FAWS include WT1, WTX, and CDKN1C. Mutations in it can lead to inadequate regulation of cell division and apoptosis, which in turn contributes to the neoplastic transformation of renal cells. Examples of hereditary syndromes associated with FAWS include Williams syndrome, Bloom syndrome, and Down syndrome, which are often accompanied by other organ and tissue abnormalities. Polymorphisms of certain genes also play a role: for example, variants of the TP53 gene may also increase the risk of developing this disease.
Risk factors for the development of this disease
There are several risk factors that may contribute to the development of familial Wilms tumor. These include:
- Heredity: Having a family history of OCD can significantly increase the likelihood of children developing the disease.
- Genetic syndromes: Having inherited conditions such as Williams syndrome and Bloom syndrome may lead to an increased risk of developing the tumor.
- Environmental factors: Exposure to certain chemicals (pesticides, carcinogens) and physical factors may also contribute to the development of the disease.
- Gender: According to statistics, girls are slightly more susceptible to this disease than boys.
Diagnosis of this disease
Diagnosis of familial Wilms tumor involves a series of steps, starting with a clinical examination and ending with more complex laboratory and radiological examination methods:
- Main symptoms: the tumor may manifest itself as an enlarged abdomen, pain in the kidney area, hematemesis and anemia.
- Laboratory tests include a complete blood count and urine analysis for abnormal protein.
- Radiological examinations: ultrasound, CT and MRI of the abdominal organs help to identify the presence of a tumor and assess its size.
- Other diagnostic tests: A biopsy is sometimes used to determine the characteristic features of the tumor.
- Differential diagnosis: It is important to differentiate OC from other renal tumors such as nephroblastoma, crystalluria, and infectious kidney diseases.
Treatment
Treatment of familial Wilms tumor requires a multidisciplinary approach and depends on the stage of the disease. Treatment usually includes:
- General treatment: Surgery is the main method, which involves removing the tumor and, if necessary, affecting nearby tissues.
- Pharmacological treatment: Chemotherapy is often given after surgery to prevent recurrence. Drugs such as cyclophosphamide and doxorubicin may be used as part of the treatment.
- Surgical treatment: may include either partial or total nephrectomy.
- Other treatments: In some cases, radiotherapy may be needed, especially in advanced stages of the disease or if it recurs.
List of medications used to treat this disease
The main drugs used in the treatment of familial Wilms tumor are:
- Cyclophosphamide
- Doxorubicin
- etoposide
- Vincristine
- Ifosfamide
- Topotecan
Disease monitoring
Monitoring of the patient's condition after treatment for familial Wilms tumor includes regular follow-up examinations:
- Control stages: 1st stage 3 months after treatment, then every six months for 2-3 years and then annually.
- Prognosis: With early diagnosis and adequate therapy, 5-year survival is more than 85%.
- Complications: relapses of the disease are possible, as well as complications associated with chemotherapy (myelosuppression, disability, secondary tumors).
Age-related features of the disease
Familial Wilms tumor typically appears in the 1-5 age group, but in recent years there has been an increase in the number of cases in older children. In younger patients, the tumor may be more aggressive, requiring intensive treatment, while in adolescents, a less aggressive tumor process is more often observed.
Questions and Answers
- What are the main symptoms of familial Wilms tumor? The main symptoms are abdominal enlargement, pain in the kidney area, anemia and hematemesis.
- How is familial Wilms tumor diagnosed? Diagnosis includes clinical examination, laboratory tests and radiological examinations such as ultrasound, CT, MRI.
- What are the main treatment methods? Treatment includes surgery, chemotherapy and, in some cases, radiation therapy.
- Is it possible to predict the risk of relapse? Yes, the predicted risk of relapse depends on the stage of the disease and the clinical picture, but with early diagnosis it is low.
- Is there a genetic predisposition? Yes, familial Wilms tumor is often inherited, and mutations in certain genes contribute to its development.
Advice from Dr. Oleg Korzhikov
"Familial Wilms tumor requires a careful approach to diagnosis and treatment. If there are cases of Wilms tumor in your family, be sure to consult a geneticist to assess the risks. Pay attention to any changes in your child's health - an enlarged abdomen, pain in the kidney area can be signs of the disease. It is also important to follow the doctor's recommendations during treatment and monitor the child's condition for timely detection of possible complications. Antigen monitoring of emotions will help you stay informed about the health status of recovery and make the necessary diagnosis together with your doctor."
