1978
DOI: 10.1590/s0004-282x1978000300005
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Sindrome de Parinaud indicando hidrocefalo descompensado em pacientes com derivação liquórica

Abstract: A paralisia do olhar conjugado no plano vertical, associado ou não a alterações pupilares, conhecida como síndrome de Parinaud (SP) 17 , tem sido considerada, especialmente em comunicações neurocirúrgicas, como sinal patognomômico de tumor da região pineal ou da porção posterior do 111 ventrículo 3,5,ιι,ΐ8 β Esse conceito levou alguns autores a indicar radioterapia em pacientes com hipertensão endocraniana e SP, após a realização de derivação liquórica 14 . Poucos relatos salientam a correlação da SP com obs… Show more

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Cited by 2 publications
(4 citation statements)
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“…20,22 Pathophysiological Theories Before the identification of the anatomical structure responsible for vertical gaze, 7,48 some authors proposed that cystic dilation of the suprapineal recess with herniation in the quadrigeminal cistern, frequently observed in obstructive hydrocephalus 32,37,43 and dilation of the upper portion of the aqueduct rostral to the obstruction, 29 could distort and compress the tectal plate where the center for vertical gaze was thought to be located. 9,18,38,39,49,54,61 Other theories included axial enlargement of the third ventricle leading to stretching of the posterior commissure, 12 axial enlargement of the third ventricle associated with distortion and caudal displacement of the mesencephalon, 3 dilation of the rostral portion of the aqueduct with distortion and stretching of the periaqueductal gray matter, 37 and gliosis of the periaqueductal gray matter. 37 Upward gaze palsy can also be observed in cases in which supratentorial space-occupying lesions induce posterior herniation of the temporooccipital lobes.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…20,22 Pathophysiological Theories Before the identification of the anatomical structure responsible for vertical gaze, 7,48 some authors proposed that cystic dilation of the suprapineal recess with herniation in the quadrigeminal cistern, frequently observed in obstructive hydrocephalus 32,37,43 and dilation of the upper portion of the aqueduct rostral to the obstruction, 29 could distort and compress the tectal plate where the center for vertical gaze was thought to be located. 9,18,38,39,49,54,61 Other theories included axial enlargement of the third ventricle leading to stretching of the posterior commissure, 12 axial enlargement of the third ventricle associated with distortion and caudal displacement of the mesencephalon, 3 dilation of the rostral portion of the aqueduct with distortion and stretching of the periaqueductal gray matter, 37 and gliosis of the periaqueductal gray matter. 37 Upward gaze palsy can also be observed in cases in which supratentorial space-occupying lesions induce posterior herniation of the temporooccipital lobes.…”
Section: Discussionmentioning
confidence: 99%
“…Most of these theories have had to be revised since the identification of the anatomical structure responsible for upward gaze, which is located in the periaqueductal gray matter ventral to the aqueduct, in the dorsal interstitial nucleus of the medial longitudinal fasciculus. 7,48 The region of the upper brainstem as well as all structures located in or around the notch of the tentorium are known to be subject to significant anatomical modifications due to pressure variations across the tentorium; 4,9,18,23,[29][30][31][32][33][37][38][39]42,43,49,58,60,62 this is typical in obstructive hydrocephalus due to aqueductal stenosis. All these changes can be explained by the existence of a long-standing pressure gradient across the tentorium, with higher pressure levels in the supratentorial compartment and lower pressure levels in the posterior fossa.…”
Section: Discussionmentioning
confidence: 99%
“…[9,18,38,39,49,54,61] Other theories included axial enlargement of the third ventricle leading to stretching of the posterior commissure, [12] axial enlargement of the third ventricle associated with distortion and caudal displacement of the mesencephalon, [3] dilation of the rostral portion of the aqueduct with distortion and stretching of the periaqueductal gray matter, [37] and gliosis of the periaqueductal gray matter. [37] Upward gaze palsy can also be observed in cases in which supratentorial space-occupying lesions induce posterior herniation of the temporo-occipital lobes.…”
Section: Pathophysiological Theoriesmentioning
confidence: 99%
“…Most of these theories have had to be revised since the identification of the anatomical structure responsible for upward gaze, which is located in the periaqueductal gray matter ventral to the aqueduct, in the dorsal interstitial nucleus of the medial longitudinal fasciculus. [7,48] The region of the upper brainstem as well as all structures located in or around the notch of the tentorium are known to be subject to significant anatomical modifications due to pressure variations across the tentorium; [4,9,18,23,[29][30][31][32][33][37][38][39]42,43,49,58,60,62] this is typical in obstructive hydrocephalus due to aqueductal stenosis. All these changes can be explained by the existence of a long-standing pressure gradient across the tentorium, with higher pressure levels in the supratentorial compartment and lower pressure levels in the posterior fossa.…”
Section: Pathophysiological Theoriesmentioning
confidence: 99%