Table 1.
Utility of point of obstruction model
| Point of obstruction | Differential DX | Treatments available |
|---|---|---|
| Foramen of Monro | Tumor | Shunt (unilateral or bilateral) |
| Congenital absence | Endoscopic septum opening | |
| Ventriculitis | ||
| Functional | ||
| Aqueduct of Sylvius | Tumor | Shunt |
| Birth defect | ETV | |
| Secondary | ||
| 4th Ventricle foramina | Infection | Shunt |
| Tumor | ETV | |
| Severe Chiari | Surgical opening | |
| Spinal to CSAS | Subarachnoid | Shunt |
| Hemorrhage | ETV | |
| LP shunt | ||
| Arachnoid villi | Hemorrhage or infection | VP or LP shunt |
| Venous hypertension | Pseudotumor | VP or LP shunt |
| Congenital hydrocephalus | Clot lysis | |
| Sinus thrombosis | Bariatric surgery for obesity-related pseudotumor |
DX diagnosis, ETV endoscopic third ventriculostomy, CSAS cortical subarachnoid space, LP lumboperitoneal, VP ventriculoperitoneal