For neuroblastoma, if recurrence occurs, the patient may show symptoms like recurrent headaches, dizziness, nausea, and vomiting. Additionally, if the optic nerve is involved, there may be a decrease in vision and visual field defects. Even the possibility exists that the tumor could recur, increase in size, and compress surrounding important blood vessels and nerves, leading to an increase in intracranial pressure, which manifests as worsening of the original symptoms of headaches and dizziness. Once such symptoms occur, it generally suggests a high likelihood of neuroblastoma recurrence. If it causes symptoms such as hemiplegia and aphasia, it can generally be confirmed.