A xanthochromic CSF indicates

A xanthochromic CSF indicates

• A. Cerebral hemorrhage
• B. Traumatic tap
• C. Bacterial meningitis
• D. Viral meningitis

Answer: (A)

Xanthochromic CSF means the fluid has yellow coloring from breakdown products of red blood cells in the CSF, specifically bilirubin. This color change takes time to develop, so it points to blood having entered the CSF in the past—most classically from a hemorrhagic event in the subarachnoid space. In other words, there has been bleeding into the CSF, not just a current puncture wound. That’s why this finding strongly suggests cerebral hemorrhage, such as subarachnoid hemorrhage. A traumatic tap can give blood in the CSF, but it usually doesn’t produce the bilirubin-derived yellow color unless blood has been present for a while. Bacterial or viral meningitis typically does not cause xanthochromia; their CSF findings are due to infection-related changes rather than pigment from blood breakdown.

Xanthochromic CSF means the fluid has yellow coloring from breakdown products of red blood cells in the CSF, specifically bilirubin. This color change takes time to develop, so it points to blood having entered the CSF in the past—most classically from a hemorrhagic event in the subarachnoid space. In other words, there has been bleeding into the CSF, not just a current puncture wound.

That’s why this finding strongly suggests cerebral hemorrhage, such as subarachnoid hemorrhage. A traumatic tap can give blood in the CSF, but it usually doesn’t produce the bilirubin-derived yellow color unless blood has been present for a while. Bacterial or viral meningitis typically does not cause xanthochromia; their CSF findings are due to infection-related changes rather than pigment from blood breakdown.