Which finding is a classic sign indicating raised intracranial pressure from a brain tumor?

• A. Photophobia
• B. Polyuria
• C. Tinnitus
• D. Papilledema

Answer: (D)

When intracranial pressure rises, the pressure is transmitted along the subarachnoid spaces, including around the optic nerve. This pressure disrupts axoplasmic flow in the optic nerve fibers, causing swelling of the optic disc known as papilledema. Papilledema is a classic sign of raised intracranial pressure and is commonly seen in patients with brain tumors. On eye exam, you’ll notice blurred disc margins with the disc appearing elevated, sometimes with venous engorgement or small hemorrhages.

Photophobia is more typical of migraines or meningitis, polyuria points to endocrine issues like diabetes insipidus, and tinnitus isn’t a reliable indicator of raised intracranial pressure. Papilledema directly reflects the ICP elevation caused by the tumor, making it the best answer.