Article Figures & Data
Figures
- FIG 1.
Dehiscence of the right sigmoid sinus (arrow). Lack of osseous coverage of the sigmoid sinus with the air-on-sinus sign.
- FIG 2.
Diverticulum of the left sigmoid sinus (arrow) with focal protrusion of the sigmoid sinus toward the mastoid air cells. The left sigmoid sinus was normal in shape above and below this section (A, Bone window CT; B, Postcontrast T1 MR imaging).
Tables
Cephalocele Only (n = 35) Cephalocele and SSDD (n = 21) Total (n = 56) P Value Age (yr) .71 Mean (SD) 51.5 (13.6) 49.7 (11.9) 50.8 (12.9) Range 27–79 27–67 27–79 Sex .019 Female 24 (68.6%) 20 (95.2%) 44 (78.6%) Male 11 (31.4%) 1 (4.8%) 12 (21.4%) Symptoms .235 Bilateral hearing loss 0 (0.0%) 1 (4.8%) 1 (1.8%) CSF leak 15 (42.9%) 9 (42.9%) 24 (42.9%) Incidental 17 (48.6%) 5 (23.8%) 22 (39.3%) Headache secondary to IIH 1 (2.9%) 1 (4.8%) 2 (3.6%) Meningitis 1 (2.9%) 3 (14.3%) 4 (7.1%) Meningitis with CSF leak 1 (2.9%) 1 (4.8%) 2 (3.6%) Otorrhea 0 (0.0%) 1 (4.8%) 1 (1.8%) Content of cephalocele .672 Brain and meninges 13 (37.1%) 9 (42.9%) 22 (39.3%) Meninges 22 (62.9%) 12 (57.1%) 34 (60.7%) Location .866 Anterior skull base 21 (60.0%) 12 (57.1%) 33 (58.9%) Skull base foramina 2 (5.7%) 2 (9.5%) 4 (7.1%) Temporal bone 12 (34.3%) 7 (33.3%) 19 (33.9%) Volume of cephalocele (mm³) .015 Mean (SD) 3828 (3559) 1562 (1511) 2979 (3144) Median (minimum-maximum) 40–12,617 30–4872 30–12,617 Cephalocele repaired? .141 No 17 (48.6%) 6 (28.6%) 23 (41.1%) Yes 18 (51.4%) 15 (71.4%) 33 (58.9%) - Table 2:
Logistic regression for volume less than average (3086 mm³) versus SSDD association with cephalocele
Presence of SSDD Volume below average 3086 mm³ OR = 3.58 95% CI, 2.30–4.86P = .05 Constant 0.25 (−0.85–1.35) Observations 56 Log likelihood –34.91 Akaike information criterion 73.81
