Indunil Karunarathna on CSF Xanthochromia in SAH
Indunil Karunarathna, Founder of Uva Clinical Research Lab (UCRL), shared on LinkedIn:
”Xanthochromia in Cerebrospinal Fluid Diagnostic Relevance, and Implications in Subarachnoid Hemorrhage
Uva Clinical Research Lab 2025, Uva Clinical Anaesthesia and Intensive Care ISSN 2827-7198, 2025
Xanthochromia refers to the yellowish discoloration of cerebrospinal fluid (CSF) due to the presence of bilirubin—a breakdown product of hemoglobin resulting from the lysis of red blood cells in the subarachnoid space.
This clinical finding holds paramount diagnostic significance, particularly in the context of suspected subarachnoid hemorrhage (SAH), where imaging may be inconclusive.
Xanthochromia typically becomes detectable within 6 to 12 hours after hemorrhage and may persist for up to four weeks, offering a critical window for diagnosis when radiologic modalities fail.
This comprehensive review elucidates the etiology, epidemiology, pathophysiology, histopathological basis, and clinical evaluation of xanthochromia.
Etiologically, while SAH is the most clinically urgent cause, other contributors include neoplasms, infections, and systemic hyperbilirubinemia.
The visual detection of xanthochromia remains common, but spectrophotometry provides superior sensitivity and specificity, allowing precise differentiation of bilirubin from other pigments such as oxyhemoglobin.
The integration of lumbar puncture and CSF analysis into the diagnostic algorithm remains indispensable, especially after a negative noncontrast CT scan in patients presenting with thunderclap headaches or other SAH-compatible symptoms.
A multidisciplinary approach involving emergency physicians, neurologists, neurosurgeons, radiologists, and laboratory technicians is vital to ensure accurate diagnosis and timely treatment, particularly in the context of aneurysmal rupture.
Understanding the nuances of xanthochromia enhances diagnostic accuracy, minimizes unnecessary interventions, and improves patient outcomes in neurologic emergencies.”
Read the full article here.
Article: Xanthochromia in Cerebrospinal Fluid Diagnostic Relevance, and Implications in Subarachnoid Hemorrhage
Author: Indunil Karunarathna
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