| Case | Age/sex | Duration (months) | Previous history | Symptom | Laboratory test | CSF test | Lesions on MRI | Treatment | Follow-up | WBC | Protein (g/mL) |
| 1 | 34/M | 2 | Sinusitis | Headache, CN VII | ESR↑ | 3 | 5200 | Falx cerebri, tentorium | MP | SR | 2 | 64/M | 3 | Otitis media surgery | Headache | CRP↑ | 14 | 785 | Frontal and temporal dura, tentorium | DXM | SR | 3 | 63/M | 4 | — | CN II, IV, VI | CRP↑ | 0 | 263 | Right temporal dura | MP | SR | 4 | 53/F | 3 | — | Headache, cognitive decline | — | 0 | 213 | Diffuse dural thickening | MP | SR | 5 | 61/F | 28 | Mastoiditis | Headache, ataxia, CN II, VII, VII, XII | ESR↑, CRP↑, WBC↑, C4↑, p-ANCA (+), ANA (+) | 10 | 472 | Diffuse dural thickening | MP, MMF | RR | 6 | 64/F | 7 | Sinusitis surgery | Headache CN II, III, VI, VII | ESR↑, CRP↑, p-ANCA (+), MPO-ANCA (+), ANA (+), RF (+), anti-Ro-52 (+) | 0 | 627 | Falx cerebri, tentorium | MP, Aza | SR | 7 | 68/M | 24 | — | Headache | ESR↑, CRP↑, p-ANCA (+), MPO-ANCA (+), ANA (+), RF (+) | 5 | 524 | Frontal and occipital dura | MP, Aza | RR | 8 | 49/F | 36 | Mastoiditis, sinusitis | Headache, CN II, V, limb numbness | ESR↑, CRP↑, p-ANCA (+), MPO-ANCA (+) | 96 | 5548 | Frontal and apical dura, falx cerebri, T1–T6 | MP, HGG, MMF | RR | 9 | 67/M | 3 | Mastoiditis | Headache, CN VII, VII | ESR↑, CRP↑, p-ANCA (+), MPO-ANCA (+) | 60 | 1150 | Falx cerebri, tentorium | MP | SR | 10 | 37/M | 6 | Sinusitis | Limb numbness | — | 4 | 524 | Diffuse dural thickening | MP, MMF | SR | 11 | 44/F | 4 | — | Headache | WBC↑ | 0 | 187 | Falx cerebri, tentorium | MP | SR | 12 | 41/F | 5 | Sinusitis | Headache | ESR↑, CRP↑, WBC↑ | 0 | 230 | Diffuse dural thickening | MP | SR | 13 | 58/M | 4 | Sinusitis surgery | Headache | CRP↑ | 2 | 1094 | Falx cerebri | DXM | SR | 14 | 62/F | 3 | — | Headache, ataxia CN II, VII, VII, XII | — | 2 | 1557 | Diffuse dural thickening | MP | SR | 15 | 53/M | 5 | Traumatic brain injury, mastoiditis | Headache, CN X | ESR↑, CRP↑ | 20 | 1375 | Tentorium | DXM | SR | 16 | 24/F | 1 | — | Headache | WBC↑ | 1 | 361 | Falx cerebri, tentorium | MP, Aza | SR |
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