The term hypoglycorrhachia is defined as a low glucose level in the cerebrospinal fluid and is frequently defined in the literature as a CSF glucose level of <40mg/dL1.
Causes of hypoglycorrhachia
Hypoglycorrhachia is usually indicative of bacterial, fungal, or tuberculous meningitis2. A case series of 89 patients showed the following differential diagnostic causes of hypoglycorrhachia3:
| Cause | Frequency |
|---|---|
| Bacterial meningitis | 24 % |
| Fungal meningitis | 15 % |
| Ischemia/ICB | 13 % |
| Malignancy | 11 % |
| Viral meningitis | 6 % |
| Neurosarcoidosis | 4 % |
| Neurosyphilis | 4 % |
| Cerebral toxoplasmosis | 3 % |
References