ArticleJournal of neurosurgery. Case lessons2026
Milky cerebrospinal fluid without infection during endoscopic hematoma removal: illustrative case.
Article in Journal of neurosurgery. Case lessons, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundReports of milky CSF in patients with intracerebral hemorrhage in the absence of infection are rare. The existing literature indicates that hypertriglyceridemia is the predominant cause of CSF turbidity. In this article, the authors describe an illustrative case of milky CSF related to hypertriglyceridemia and provide a review of the pertinent literature. OBSERVATIONS: A 57-year-old man with impaired consciousness was admitted to the authors' hospital. CT revealed a thalamic hemorrhage associated with ventricular perforation. Emergency endoscopic excision of the hematoma was performed, and intraoperative hematoma evacuation revealed milky CSF in the third ventricle. Blood serum had a cloudy appearance, with an abnormally high triglyceride (TG) level of 2445 mg/dL, without signs of bacterial infection. Hypertriglyceridemia was observed in 7 previously reported cases of milky CSF. Milky CSF without infection was encountered during endoscopic hematoma removal. Based on current case reports, including the present case, hypertriglyceridemia is suggested to contribute to milky CSF. LESSONS: Because of their molecular weight, TGs cannot penetrate the blood-brain barrier. Therefore, milky CSF is suspected to be caused by high concentrations of TGs eluted from the hematoma. This is the first case report of milky CSF observed using an intraoperative video of endoscopic surgery. https://thejns.org/doi/10.3171/CASE25701.
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