What type of cancers are central nervous system tumours?

• A. Tumours arising from brain or spinal cord tissues.
• B. Tumours arising from reproductive cells.
• C. Tumours from hormone-producing cells.
• D. Tumours derived from glial cells.

Answer: (A)

CNS tumors are cancers that originate in the brain or spinal cord. That means they arise from tissues within the central nervous system itself, which can include a variety of cell types found there. While some CNS tumors come from glial cells (a common example), not all do—other CNS tumors originate from different brain or spinal cord tissues, such as the meninges or neurons. The other options describe cancers from reproductive or hormonal cell types, which aren’t the defining origin of central nervous system tumors. So the best description is tumors arising from brain or spinal cord tissues.