Clivus-involved immunoglobulin G4 related hypertrophic pachymeningitis mimicking meningioma: A case report

Table 1 Examination results of cerebral fluid through the years

	2014	2016	2020
General characters	Normal	Normal	Normal
Karyocytes (106/L)	120	90	1
Mononuclear cells (%)	97.0	92.0	-
Multinucleate cells (%)	3.0	8.0	-
Pus cells	Unseen	Unseen	Unseen
Protein quantification (g/L)	1.02	0.69	0.55
Glucose (mmol/L)	2.55	4.07	3.95
Chloride (mmol/L)	127.2	124.4	127
Acid-fast bacillus	None	None	None
Ink staining	None	None	None
Gram staining	None	None	None
Fungal and bacterial culture	Undone	Negative	Negative
TB-DNA	Undone	Negative	Negative

Reference value: Karyocytes (< 10 × 10⁶/L), pus cells (none), protein quantification (0.15-0.45 g/L), glucose (2.5-4.4 mmol/L), and chloride (120-130 mmol/L).