Optociliary Shunt Vessels: Role in Diagnosis and Treatment of Atypical Pseudotumor Cerebri.

A 46-year-old man presented with severe visual loss and optic atrophy associated with optociliary shunt vessels. The diagnostic work-up revealed intracranial hypertension and cerebral venous sinus stenosis, with no evidence of previous thrombosis. In view of the severe visual dysfunction, both eyes were submitted to optic nerve sheath fenestration. After surgery, a regression of collateral vessels was observed in both eyes.

"La obstrucción estaba abajo": tumores de la médula espinal e hipertensión intracraneal

Aumento de la presión intracraneal, hidrocéfalo y papiledema son observados ocasionalmente en pacientes portadores de tumores medulares en la región cervical o en la unión craneocervical, y entre otros, la obstrucción mecánica de la circulación del líquido cefalorraquídeo es asumida como responsable para tales síntomas y signos. No obstante, la hipertensión intracraneal es un raro fenómeno en tumores espinales de localización tóracolumbar. Los autores describen dos pacientes en quienes un tumor en tal localización (schwannoma benigno y paraganglioma) se asoció a síntomas de hipertensión intracraneal, hidrocefalia y papiledema. Se piensa que este tipo de lesiones puede interferir activamente en la dinámica del flujo del líquido cefalorraquídeo en razón de que la ocupación de espacio impide la expansión del saco dural y espacio subaracnoideo espinal que se piensa juegan algún papel en la compensación de los cambios de volumen y la presión intracraneal

Increased intracranial pressure, hydrocephalus and papilledema are occasionally observed in patients harboring spinal tumors in the cervical region or at the craniocervical junction, and among others, the mechanical obstruction to the cerebrospinal fluid circulation is assumed to be responsible for such symptoms and signs. However, increased intracranial pressure is very rare in spinal tumors located in the thoraco-lumbar region. Two patients are described by the authors in whom a benign thoracolumbar tumor (benign schwannoma and paraganglioma) was associated with symptoms of increased intracranial pressure, hydrocephalus and papiledema. It has been suggested that this kind of lesions could actively interfere with cerebrospinal fluid dynamics by their mass effect, especially by preventing the expansion of the dural sac and spinal subarachnoid space which may play some roce in compensating for volume changes and intracranial pressure