How is neuroblastoma diagnosed?

Written by Chen Yu Fei
Neurosurgery
Updated on September 05, 2024
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For patients with neuroblastoma, diagnosis is primarily through the symptoms, signs, detailed physical examinations, medical history inquiries, and most importantly, radiological data, which includes CT scans or MRI of the head. Definitive diagnosis requires surgical removal of the tumor. A small amount of tumor tissue is retained after excision and used for pathological examination to confirm the diagnosis. Neuroblastoma is categorized as an epithelial-like malignant tumor, indicative of a high degree of malignancy. In most cases, early in the disease, the tumor adheres to surrounding tissues, which greatly complicates complete surgical removal, and most patients have a poor prognosis.

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Written by Chen Yu Fei
Neurosurgery
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Neuroblastoma examination items

For neuroblastoma, the examination items mainly include the patient's vital signs and physical examination, including detailed examinations to observe if there are any obvious pathological signs. Additionally, it is necessary to inquire about the patient’s medical history, especially past medical history and family history. Main examination items include laboratory tests, routine blood and urine tests, biochemistry, and tumor-related tests. Furthermore, examinations also involve using a cranial CT scan, MRI of the head, and if necessary, an enhanced MRI scan of the head, to further determine the presence of neuroblastoma, as well as its location, quantity, and the relationship between the surrounding tissues, blood vessels, and nerves.

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Age of onset of neuroblastoma

Neuroblastoma, typically arises from primitive neural crest cells, is more commonly found in the sympathetic ganglia and adrenal medulla. There is no specific age for the onset of neuroblastoma, but research indicates that it is more commonly diagnosed in children. The exact causative factors of neuroblastoma are not yet fully understood, but it is widely believed to involve congenital genetic factors, including acquired genetic mutations. Clinically, the presentation largely depends on the location of the tumor, the age at diagnosis, and the degree of malignancy of the tumor. In most cases, the tumor originates in the abdominal cavity, with a higher occurrence in the adrenal glands in children.

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Causes of Neuroblastoma

Currently, there is no definitive conclusion about the specific causes of neuroblastoma, but most scholars believe that the occurrence of neuroblastoma is the result of congenital genetic factors combined with acquired factors. For patients with neuroblastoma, there is often a family history of genetic diseases showing a familial clustering tendency. In addition, poor living environments and habits, including exposure to radioactive contamination or prolonged exposure to electromagnetic radiation, may also contribute to the development of neuroblastoma.

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Early symptoms of neuroblastoma

For neuroblastoma, in the early stages of the disease, mild headaches, dizziness, nausea, and vomiting often occur, but the symptoms are relatively mild and most can be tolerated. As the disease gradually progresses and the tumor volume begins to increase, it compresses the surrounding brain tissue and cranial nerves, causing the patient to exhibit certain degrees of headache, dizziness, nausea, vomiting, and other clinical manifestations. As the tumor volume further increases and cerebral edema becomes apparent with elevated intracranial pressure, it may lead to cranial nerve dysfunction in patients. For instance, it might trigger epileptic seizures or cause patients to experience hemiplegia, aphasia, and other clinical manifestations. Once these symptoms occur, it is advisable to visit a local hospital early for treatment.

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Written by Chen Yu Fei
Neurosurgery
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Neuroblastoma treatment

Neuroblastoma is relatively considered a malignant tumor, and its growth rate is quite rapid. It often adheres to surrounding tissues in the early stages, which makes it very difficult to completely remove surgically. However, even so, it is still advisable to opt for surgical treatment once neuroblastoma is detected. The tumor should be completely removed surgically, and a small amount of tumor tissue should be retained for pathological examination after removal. Based on the results of the pathological examination, it will be determined whether additional treatments such as radiotherapy or chemotherapy are needed. Furthermore, since some neuroblastomas are sensitive to radiotherapy, it is recommended to promptly take the patient to a local hospital for treatment after surgery.