Parinaud syndrome

Parinaud syndrome, or dorsal midbrain syndrome. It presents with a triad of impaired upward gaze, convergence retraction nystagmus, and pupillary hyporeflexia. Patients can also have lid retraction in the primary position, called Collier’s sign. The causes of Parinaud include pineal gland tumors, midbrain lesions, multiple sclerosis, and arteriovenous malformations.