Parinaud’s syndrome (Paralysie des mouvements associe´s des yeux named for Henri Parinaud (1844–1905). 1) is a supranuclear paralysis of vertical gaze 2) resulting from damage to the mesencephalon 3).
Lid retraction:(Collier’s sign)
Parinaud’s Syndrome results from injury, which compresses the the quadrigeminal plate at the rostral interstitial nucleus of medial longitudinal fasciculus (riMLF), specifically, compression or ischemic damage of the mesencephalic tectum, including the superior colliculus adjacent oculomotor (origin of cranial nerve III) and Edinger-Westphal nuclei, causing dysfunction to the motor function of the eye.
Stroke or brainstem hemorrhage in the upper part.
Gradual benign loss of upgaze in senescence.
Aberrant regeneration of the third nerve
Limited upgaze in elderly patients
Progressive supranuclear palsy
Classically, it has been associated with three major groups:
Women in their 20s-30s with multiple sclerosis.
A 26 year old Pakistani lady with first presentation of a demyelinating event, presenting as Parinaud’s syndrome. A video demonstrates a convergence-retraction nystagmus on upgaze and failure of accommodation, and her brain imaging confirms a corresponding pre-tectal contrast enhancing T2 hyperintense lesion suggestive of demyelination 4).
Older patients following stroke of the upper brainstem However, any other compression, ischemia or damage to this region can produce these phenomena: obstructive hydrocephalus, midbrain hemorrhage, cerebral arteriovenous malformation, trauma and brainstem toxoplasmosis infection. Neoplasms and giant aneurysms of the posterior fossa have also been associated with the midbrain syndrome.
Vertical supranuclear ophthalmoplegia has also been associated with metabolic disorders, such as Niemann-Pick disease, Wilson’s disease, kernicterus, and barbiturate overdose.
Isolated Oculomotor Nerve Nucleus Infarct 5).
Unilateral vascular ischemic lesion 6).
A case of longstanding, undiagnosed spontaneous intracranial hypotension (SIH) with an acute presentation of Parinaud’s syndrome, in whom serial imaging demonstrated development of a midbrain mass. The patient was ultimately diagnosed with tumefactive venous infarction secondary to SIH. However, this patient underwent a brainstem biopsy, which in retrospect may have been avoidable. This case demonstrates the imaging features of tumefactive venous infarction in SIH and highlights the risk of misinterpretation as a neoplasm with potentially catastrophic consequences 7).
Miller Fisher syndrome 9).
Parinaud’s syndrome, includes multiple clinical signs, with the most prominent being paralysis of upward gaze.
Parinaud’s Syndrome is a cluster of abnormalities of eye movement and pupil dysfunction, characterized by:
Paralysis of upgaze: Downward gaze is usually preserved. This vertical palsy is supranuclear, so doll’s head maneuver should elevate the eyes, but eventually all upward gaze mechanisms fail.
Pseudo-Argyll Robertson pupils: Accommodative paresis ensues, and pupils become mid-dilated and show light-near dissociation.
Convergence-Retraction nystagmus: Attempts at upward gaze often produce this phenomenon. On fast up-gaze, the eyes pull in and the globes retract. The easiest way to bring out this reaction is to ask the patient to follow down-going stripes on an optokinetic drum.
Eyelid retraction (Collier’s sign) Conjugate down gaze in the primary position: “setting-sun sign”. Neurosurgeons will often see this sign most commonly in patients with failed ventriculoperitoneal shunts. It is also commonly associated with bilateral papilledema. It has less commonly been associated with spasm of accommodation on attempted upward gaze, pseudoabducens palsy (also known as thalamic esotropia) or slower movements of the abducting eye than the adducting eye during horizontal saccades, see-saw nystagmus and associated ocular motility deficits including skew deviation, oculomotor nerve palsy, trochlear nerve palsy and internuclear ophthalmoplegia.
MRI is very helpful in determining the cause and thus guiding appropriate treatment.
A 3-year-old boy presented with headache, disturbance of consciousness, and Parinaud’s syndrome. Magnetic resonance (MR) imaging revealed a pineal mass lesion, and total resection of the tumor was achieved. The histological diagnosis was mature teratoma. He did not receive further treatment, and did well without recurrence for 20 years. However, he suffered headache 21 years after resection, and MR imaging revealed a homogeneously enhanced pineal mass with low minimum apparent diffusion coefficient value and proton MR spectroscopy showed a huge lipid peak. The levels of tumor markers were not elevated. Cerebrospinal fluid (CSF) cytology found atypical cells with large nuclei and irregularly shaped nucleoli. To elucidate the relationship between the primary and recurrent tumors, we reviewed the histological specimens and CSF cytology at the initial treatment and found a subset of incompletely differentiated components resembling fetal tissues in the histological specimen and atypical large cells in the CSF. Based on these radiological and histological findings, Mano et al., presume that the recurrent disease was disseminated germinoma after the resection of disseminated IMT. He received chemotherapy and craniospinal radiation therapy, and the enhanced lesion and atypical cells in the CSF disappeared. This case demonstrates that disseminated IMT can be controlled for the long term without adjuvant therapy, but may recur as germinoma. Tumor dormancy may account for this unusual course 10).