Among the listed options, which is the most common benign brain tumor?

• A. Glioblastoma
• B. Medulloblastoma
• C. Astrocytoma
• D. Meningioma

Answer: (D)

A benign brain tumor that tends to be the most common among the options is meningioma. These tumors arise from the arachnoid cells of the meninges and usually grow slowly, exerting pressure on surrounding brain tissue rather than invading it, which is why they’re considered benign in behavior. They make up a large portion of primary brain tumors (often cited around a third) and most are WHO grade I. Imaging typically shows an extra-axial mass with a dural tail sign, and they are more common in women and older adults.

In comparison, glioblastoma is a highly malignant astrocytoma, the most common malignant primary brain tumor in adults. Medulloblastoma is a malignant tumor that commonly occurs in the cerebellum of children. Astrocytomas cover a range of grades from relatively less aggressive to highly malignant, but they are not as characteristically benign or as common as meningiomas. So, among these options, meningioma stands out as the most common benign brain tumor.