Risk factors in 19 patients with CVST.
| Risk factors | n |
|---|---|
| Unknown | 2 |
| Thrombophilia | 8 |
| Hyperhomocysteinemia | 4 |
| Protein C deficiency | 1 |
| Protein S deficiency | 3 |
| Systemic disorders | 4 |
| Systemic lupus erythematosus | 1 |
| Thyroid disease | 1 |
| Kidney transplantation | 1 |
| Hepatic dysfunction | 1 |
| Tumor* | 2 |
| Infection | 9 |
| Central nervous system | 1 |
| Ear, sinus, mouth, face, and neck | 8 |
| Puerperium | 2 |
| Drugs | 3 |
| Oral contraceptives | 1 |
| Immunosuppressor | 2 |
↵* Includes 2 gastrointestinal carcinomas CVST - cerebral venous sinus thrombosis