Comparisons of clinical characteristics, brain MRI findings, and responses to epidural blood patch between spontaneous intracranial hypotension and post-dural puncture headache: retrospective study

Table 2 Brain MRI findings in patients with SIH and PDPH

Signs	SIH (n = 53)	PDPH (n = 23)	p-value	Interobserver Agreement
Qualitative signs
Pachymeningeal enhancement	24 (45.3%)	6 (26.1%)	0.134	0.692
Venous distention of the lateral sinus	25 (47.2%)	9 (39.1%)	0.618	0.601
Subdural fluid collection	11 (20.8%)	1 (4.3%)	0.093	> 0.99
Angle measurements, midbrain-pons angle, degrees	48 (39–55)	50 (40–59)	0.411	0.775
≥ 40°	39 (73.6%)	21 (91.3%)	0.132	0.216
< 40°	14 (26.4%)	2 (8.7%)
vG/SS angle, degrees	74 (60–84)	85 (73–97)	0.020	0.843
Size measurements, mm
Pituitary height	7.7 (7.0–8.9)	7.6 (6.1–8.6)	0.256	0.768
Suprasellar cistern	4.4 (2.6–5.9)	4.6 (3.9–5.6)	0.483	0.892
Prepontine cistern	4.2 (3.1–5.4)	4.1 (3.5–5.1)	0.955	0.888
Mamillopontine distance	7.1 (5.6–7.8)	6.6 (5.8–8.0)	0.703	0.866

spontaneous intracranial hypotension (SIH); post-dural puncture headache (PDPH); magnetic resonance imaging (MRI); the angle between the vein of Galen and the straight sinus (vG/SS angle)
Values are presented as the number of patients (%) or median (IQR)

ISSN: 1471-2377