Aquäduktsyndrom

Parinaud syndrome, also known as the dorsal midbrain syndrome, is a supranuclear vertical gaze disturbance caused by compression of the superior tectal plate.

Clinical presentation

Parinaud syndrome is characterized by a classic triad of findings:

• upward gaze palsy, often manifesting as diplopia
• pupillary light-near dissociation (pupils respond to near stimuli, but not light)
• convergence-retraction nystagmus

Its importance lies in that recognition of Parinaud syndrome localizes pathology to impingement of or origin in the tectal plate, most frequently due to a posterior commissure or pineal region mass (typically solid tumors rather than pineal cysts).

History and etymology

Named after Henry Parinaud, a French ophthalmologist (1844-1905).

Siehe auch:

• Tumoren der Pinealisregion
• Mesencephalon
• Tectum mesencephali
• Prätektales Syndrom

und weiter:

• Pineozytom
• ophthalmoparesis
• Diffusionsstörung Mittelhirn
• Papillärer Tumor der Pinealisregion
• midbrain infarction