What causes neuroblastoma in children?

The exact cause of childhood neuroblastoma (Neuroblastoma) is not fully understood, but research shows that its occurrence is closely related to gene mutations, genetic factors and abnormal cell development. The following is an overview of the main pathogenic mechanisms:

1. Gene mutations: The occurrence of neuroblastoma is related to a variety of gene mutations, of which MYCN gene amplification is one of the most common molecular characteristics and is usually associated with high-risk disease and poor prognosis. In addition, ALK gene mutations are also considered to be important causative factors for neuroblastoma, especially in familial cases.

2. Abnormal cell development: Neuroblastoma originates from sympathetic nervous system cells that fail to fully mature during embryonic development. Under normal circumstances, these neural crest cells differentiate into components of the sympathetic nervous system, but if the differentiation process is blocked, it may lead to abnormal proliferation of immature cells and eventually the formation of tumors.

3. Genetic factors: About1%-2% of neuroblastoma cases are familial neuroblastoma, usually related to ALK gene or PHOX2B gene mutations. These patients often present with earlier onset of disease (mostly before the age of 1) and may have multiple tumors.

4. Environmental and sporadic factors: Most neuroblastomas are sporadic, with no obvious family history or evidence of environmental exposure. Although there are currently no clear environmental causative factors, certain exposures during pregnancy (such as chemicals or radiation) may increase the risk.

5. Other molecular mechanisms: The occurrence of neuroblastoma is also related to chromosomal abnormalities (such as 1p and 11q deletion). These genetic changes affect the balance of cell proliferation and apoptosis and promote tumor formation.

In summary, neuroblastoma in children is a multifactorial disease, and its occurrence is mainly related to gene mutations and developmental abnormalities, but the exact mechanism still needs further study.

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ReferenceInformation：https://www.cancer.gov/types/neuroblastoma