Meningioma arises from-
**Core Concept**
Meningiomas are a type of primary brain tumor that arises from the meninges, which are the protective membranes surrounding the brain and spinal cord. The meninges are composed of three layers: the dura mater, arachnoid mater, and pia mater.
**Why the Correct Answer is Right**
Meningiomas typically originate from the arachnoid cap cells, which are a type of cell found in the arachnoid mater. These cells give rise to the majority of meningiomas, which can be benign or malignant. The exact mechanism of meningioma development is not fully understood, but it is thought to involve genetic mutations and epigenetic changes that disrupt normal cell growth and regulation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because meningiomas do not typically arise from the dura mater, although they can be found in this location.
**Option B:** This option is incorrect because gliomas are a type of brain tumor that arises from glial cells, not the meninges.
**Option C:** This option is incorrect because schwannomas are a type of nerve sheath tumor that arises from Schwann cells, not the meninges.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that meningiomas are typically slow-growing and benign, but they can cause significant symptoms due to their location and potential impact on surrounding brain structures.
**Correct Answer:** C. Arachnoid cap cells.