What is the recurrence rate of brain cancer

Glioblastoma is a cancer with a high recurrence rate after surgery. Because the tumor grows in the brain, many drugs cannot pass through the blood-brain barrier. Malignant brain tumors have the characteristics of infiltration and metastasis. Even after surgical resection, they often recur. Is the chance of recurrence high? How high is the recurrence rate of brain cancer? Let's take a look:

The recurrence rate of malignant brain tumors within 5 years is as high as 80%. When surgical resection is incomplete, the tumor tissue will "continue to grow", which is not a true recurrence. The recurrence of clinical brain tumor symptoms is attributed to the continued growth of tumor tissue volume. Although micro-tumor foci have been missed, surgeons often believe that the tumor tissue has been completely removed.
What is the chance of recurrence of malignant brain tumors? According to relevant literature statistics, the recurrence rate of malignant brain tumors within 5 years is as high as 80%, which means that there is a 20% chance of no recurrence. The phenomenon of brain tumor recurrence is due to the reappearance of clinical symptoms and signs that have disappeared or alleviated after brain tumor surgery, and the re-growth of meningioma at the original surgical site found during imaging examination or re-surgery.