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GMH AND IVH PLUS VENOUS INFARCTION - keywords
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J Neurosci Res. 2008; 86(7):1482–1500.  < > outcome Genuine mantle rupture from IVHExceptionally mechanical rupture does occur in the parenchyma under pressure by extensive IVH. Neonates nursed supine while ventilated will then show a ventricular bleed nearly completely replaced by an extracerebral density in the occipital region after rupture. This very rare event was formerly believed to underly all white matter infarcts associated with IVH of the preterm, whereas it is now clear that the intermediary is not mechanical rupture of the telencephalic wall, but venous infarction. parenchymal haemorrhagic infarction associated with GMH/IVH haemorrhage grading preterm infant with grade 3 IVH that suddenly disappeared because of transparenchymal penetration of the blood into the subarachnoid/subdural space (7.5 MHz image) Outcome for temporal lobe venous infarction is worse than for frontal lobe infarction. Unfavourable outcome (cognitive and behavioural) is observed in the majority of children with a temporal PHI compared with 1/3 of children with a frontal PHI. CP is typically associated with parietal (terminal vein) involvement, especially the extensive variant of infarction. veins PHI (periventricular haemorrhagic infarction) complicates GMH-IVH in approximately 15% of cases (Golden et al. 1997, Larroque et al. 2003). GMH-IVH of all grades can be complicated by PHI, but the higher the grade the more likely PHI is to occur (Guzetta et al. 1986). PHI follows venous obstruction induced by GMH. Congestion leads to ischaemia and to secondary haemorrhagic infarction. High intraventricular pressure dilating the ventricles due to a large IVH may additionally affect flow through the subependymal veins, increasing infarct size (Volpe 1998). Cerebral palsy and cognitive impairment are common in infants with PHI (Brouwer et al. 2008, Adams-Chapman et al. 2008, Klebermass-Shrehof et al. 2012). The prognosis is dependent on location and extent of the lesion (Bassan et al. 2006 and 2007, Dudink et al. 2008, Maitre et al. 2009). Classifying PHI into venous subtypes helps to counsel parents in this difficult situation (Dudink et al. 2008). Mortality in infants with extensive PHI is high, especially when it is bilateral. In many countries, redirection of care and end of life decisions are considered in infants with bilateral PHI. Although robust data on this are lacking, it is likely that redirection of care contributes significantly to the reported mortality rates (Davis et al. 2014, Sheehan et al. 2017).  In preterms with PHI on CUS, neonatal MRI can show unsuspected cystic PVL or blood in the posterior fossa (Roelants-van Rijn et al. 2001). Late MRI can show asymmetry at the posterior limb of the internal capsule (PLIC), predictor of hemiplegia. Chorioamnionitis and funisitis are significantly more common in infants with a typical PHI; starting at 6 to 96 hours after birth (Harteman et al. 2012). Fetal thrombosis and placental infarction are significantly more often associated with an atypical PHI (antenatal or later neonatal onset). DVA in the differential diagnosis Developmental venous anomalies, relatively common in the newborn brain, may present with initial scans similar to venous infarction (Chang et al. 2010, Chen et al. 2020, Geraldo et al. 2020, Horsch et al. 2014, Lee et al. 1996, Okudera et al. 1999. The serial stability on CUS and typical MR findings confirm DVA. ultrasound description germinal matrix and veins near the caudate head CUS examples via navigator U-turn ICV variation  GMH and veins typical doppler The terminal vein (thalamostriate vein) drains into the internal cerebral vein together with the septal vein near the stria terminalis. GMH in a matrix pocket in this area can compress the terminal or septal vein or one of their adjacent branches. This leads to medullary vein congestion, haemorrhagic diapedesis and finally venous infarction. On occasion one can observe with doppler that there may be an arterial ischaemic component to this infarction.  medullary veins infarct types ——> venous variations Prognosis of venous infarction associated with GMH/IVH Infants that suffer from grade 3 GMH-IVH have a significantly increased risk for disability, especially when complicated by post-haemorrhagic ventricular dilatation that needs surgical intervention. Cerebral palsy rates in infants with IVH grade 3 range between 7-63% (Brouwer et al. 2008, Adams-Chapman et al. 2008, Klebermass-Shrehof et al. 2012). Infants that suffer from mild low-grade (i.e. grade 1 or 2) GMH-IVH are clearly at much lower risk of developmental disabilities compared to infants with grade 3 GMH-IVH or IPL. Recent data suggest that this may not be entirely true (Patra et al. 2006, Klebermass-Shrehof et al. 2012). It has been shown that low-grade GMH-IVH is followed by microstructural impairment in the periventricular and subcortical white matter (Tortora et al. 2017). Size, number and location of these minor bleedings might be of importance in infants of the lowest gestational ages.  Moderate-to-severe haemorrhage dilates the ventricle and damages the periventricular white matter even in the absence of PHI (Ballabh and de Vries 2021). This white matter injury results from oxidative stress, glutamate excitotoxicity, inflammation, perturbed signalling pathways and remodelling of the extracellular matrix. In addition, germinal matrix injury even after an uncomplicated GMH-IVH results in a relevant loss of glial precursor cells, leading to impaired myelination and cortical development (Gressens et al. 1992, Vasileadis et al. 2004). GMH-IVH can also trigger inflammation in adjacent white matter through activated microglia, passage of red blood cells and red blood cell degradation: resulting tissue injury may be secondary to free radical release and the presence of free iron (Chen et al. 2011, Gram et al. 2013, Supramaniam et al. 2013, Ley et al. 2016).  A neuropsychological assessment was performed in 50 children with unilateral PHI (n=21) or perinatal arterial ischaemic stroke (n=29) at a median age of 11 years 9 months (van Buuren et al. 2013). In children with PHI, both the early Griffiths scores (mean 87; 95% CI 83-92) and the Full-scale IQ (FSIQ) scores at school age (mean 86; 95% CI 78-94) were below the test mean of 100. In the PAIS group, early Griffiths scores were within the normal range (mean 98; 95% CI 93-104), but at school age FSIQ scores were below average (mean 87; 95% CI 80-94).  In an assessment at 2 years of age of 160 infants with median gestational age of 26.6 weeks, PHI was scored to refine outcome prediction (Cizmeci et al. 2022). PHI was mostly unilateral (90%), associated with an ipsilateral extensive (grade 3) intraventricular hemorrhage (84%), and located in the parietal lobe (51%). Sixty-four (40%) infants with PHI died in the neonatal period. Of the survivors 65% had normal cognitive and 69% had normal motor outcomes. The cerebral palsy rate was 42%. Higher PHI severity score was associated with death. Trigone involvement (terminal vein area) was associated with cerebral palsy (41% vs 14%). Associated posthaemorrhagic ventricular dilation (36%) was an independent risk factor for poorer cognitive and motor outcomes. With a retrospective hospital-based preterm infants with frontal (n=21) or temporal PHI (n=13) were assessed for early imaging versus outcome (Soltirovska Salamon et al. 2014). Unfavourable outcome was observed in 12 out of 13 children with a temporal PHI compared with six out of 21 children with a frontal PHI. Only one of the included infants with a PHI in the temporal white matter developed cerebral palsy, which was due to a parietal PHI in the contralateral hemisphere. Cognitive impairment was noted in seven infants with a frontal PHI and five with a temporal PHI. There were more infants with a temporal PHI who developed visual impairment (n=5/13) or behavioural problems (n=7/13) compared with those with a frontal PVHI (visual impairment (n=2/21), behavioural problems (n=3/21). Preterm infants with PHI were assessed with early (≤4 wk after birth) and term-equivalent age diffusion tensor MRI (Roze et al. 2015). Involvement of corticospinal tracts was assessed by visual assessment of the posterior limb of the internal capsule (PLIC) on DTI (classified asymmetrical, equivocal, or symmetrical) and by a fractional anisotropy asymmetry index. Motor outcome was assessed at ≥15 mo corrected age. Seven out of 23 infants with PHI developed unilateral spastic CP. Their PLIC was visually scored as asymmetrical in 6 and equivocal in 1 on the early DTI. Thirteen out of 16 infants with ymmetrical motor development had a symmetrical PLIC on early DTI, the remaining 3 were equivocal. All infants with unilateral CP had fractional anisotropy asymmetry on early DTI. 14/16 Infants with symmetrical motor development had symmetrical early anisotropy. Bimanual dexterity is worse in children with unilateral spastic cerebral palsy (Verhage et al. 2022). In children without CP, those with unilateral perinatal arterial stroke show a better bimanual precision compared to children with PHI. This difference appears to be associated with a preserved full scale IQ. GMH/IVH grading grading 1.  limited to subependymal matrix (GMH) 2.  flooding of < 50% of the lateral ventricle and consequently without acute ventriculomegaly (limited IVH) 3. flooding of 50% or more of one or both lateral ventricles with acute distension by clot (extensive IVH) PHI  grades 1, 2 or 3 with periventricular haemorrhagic infarction in a more or less extensive area of the periventricular parenchyma With CT, and later ultrasound, a classification was proposed in four grades (Papile et al. 1978, Pape and Wigglesworth 1979, Kuban and Teele 1984). Progression from GMH to IVH is still believed to follow mechanical rupture of bleeding under pressure, perhaps bursting through the weakest part of the ependymal lining at the stria terminalis, probably injured by some degree of hypoxia-ischaemia. Extension from limited to extensive IVH may relate to the cerebral perfusion pressure and deficient haemostasis. Progression to white matter or striatal infarction is due to compression of collector veins and is as such not a fourth grade but an association with any of the three genuine grades. Despite several ultrasound classifications subsequently published (Bowerman et al. 1984, Kuban and Teele 1984), the Papile classification, widely used for decades (Horbar et al. 2012) is now reduced to three grade: “grade 4” is now replaced by periventricular haemorrhagic infarction (PHI) (Volpe 1998, Paneth 1994). PHI can be associated to each grade of GMH-IVH. To understand the images involved in venous infarction a schematic insight into deep vein anatomy is necessary. GMH sites are indicated in red. 1 sinus rectus (straight sinus) 2 great cerebral vein of Galen 3 internal cerebral vein 4 terminal (thalamo-striate) vein 5 longitudinal caudate vein 6 medullary veins to caudate collector veins 7 superior choroidal vein 8 direct lateral vein (surface thalamic vein) 9 superior thalamic vein 10 medial atrial vein 11 basal vein of Rosenthal GMH and (large) veins 12 inferior striate vein 13 anterior cerebral vein 14 deep middle cerebral vein (insular vein) 15 inferior ventricle vein 16 inferior choroidal vein 17 lateral mesencephalic vein 18 lateral atrial vein 19 precentral cerebellar vein 20 superior vermis vein 21 inferior sagittal sinus 22 septal vein III IV. the presence of a direct lateral vein I I. the venous confluens at the stria terminalis near the foramen of Monro ——> The (variable) shape and size of veins, still very developmental in third trimester, plays a role in the occurrence and evolution of GMH and IVH. Veins near matrix areas are at risk of compression by expanding GMHs. The fragile sites are mainly near the transition of internal cerebral to terminal vein, and near the inferior ventricle vein. Terminal vein infarction is most common. venous variation that my influence onset of GMH and venous infarction V. variable high draining lateral atrial vein to the basal vein of Rosenthal II. the inferior ventricle vein in the roof of the temporal horn  V III. the U-turn from internal cerebral to terminal vein ——> II IV deep vein variation There is an ongoing interest in variations in anatomy and in flow pattern that may predispose to GMH and its sequelae (Stein and Rosenbaum 1974, Takashima et al. 1986, Gould et al. 1987, Wang et al. 2010, Taoka et al. 2017, Tortora et al. 2018, Kent et al. 2023, Camfferman et al. 2026, Steinsmo Odegard et al. 2026). A comprehensive example of deep vein classification for further study is below. One example of such variation is the U-turn of the trasniation from terminal vein to internal cerebral vein (Larroche 1977), in recent papers studied for the position and degree of acuity of the angle.  Medullary veins from just below the subcortex drain into deep veins, gradually coalescing into larger trunks (Okudera et al. 1999). This high drainage with a peculiar organisation of confluence explains the feathered appearance of the outer (subcortical) contour of a medullary venous infarct. It also explains the triangular shape as veins fan out from the ependymal collectors near the GMH. feathered outer margin of an extensive terminal vein infarction; interdigitation of spared and affected medullary veins distended veins, diapedesis but no frank infarction ? PHI, also referred to as parenchymal haemorrhagic infarction, or periventricular venous infarction, or intraparenchymal lesion, can complicate each grade of GMH-IVH. This seems to occur a few hours up to a few days after the initial GMH (Perlman et al. 1993). Post-mortem and doppler studies strongly suggest that this lesion is due to  venous obstruction and congestion (Takashima et al. 1986, Gould et al. 1987, Nakamura et al. 1990 and 1991, Paneth et al. 1994, Taylor 1995, Ghazi-Birry et al. 1997, Volpe 1998). It has been suggested that parenchymal arterial ischaemia secondary to venous obstruction contributes to injury (Toft et al. 1997).  The typical ultrasonographic appearance of PHI is a triangular, “fan-shaped” hyperechoic lesion in periventricular white matter, ipsilateral to the GMH-IVH (Guzzetta et al. 1986). In the earliest phase, the infarct is separated from the ventricular wall; it may subsequently grow, touch the ventricle and eventually merge into a single, large hyperechoic lesion together with the initial GMH-IVH. The parenchymal hyperechoic area tends to decrease after few days: this is believed to reflect the regression of venous congestion around it, leading to overestimation of the extent (Govaert and de Vries 2010). Multiple minute PHIs along the course of the medullary veins can also be observed. We speculate that these minor PHIs may result from a partial venous obstruction due to compression of a subependymal vein. The risk of developing PHI following GMH might also be related to the location of the GMH itself, especially in subjects with a peculiar venous anatomy prone to congestion.  parenchymal haemorrhagic infarction: ultrasound findings typical terminal vein infarction and invisibility of the ependymal collector (two different infants) PHI usually evolves into a cavity within periventricular white matter. As most PHIs develop adjacent to the ventricular wall, porencephaly - resulting from the cavity that merges with the ventricle - is a common observation after one or two months (Grant et al. 1982, Donn and Bowerman 1982, Fleischer et al. 1983). A cavitation resulting from PHI is usually single, asymmetric and persistent. It takes the shape of the infarcted area and will become round when submitted to increased pressure (‘porencéphalie soufflante’)(Laplace’s law). With smaller infarcts the end stage is ventricular bulging following gradual resportion of the cavities as in PVL.  Conversely, cysts of periventricular leukomalacia typically appear with symmetrical, mainly posterior distribution and tend to disappear within few weeks, insomuch that they are often undetectable at term-equivalent age (Pierrat et al. 2001). Size and location of PHI depend on which vein is involved. In some cases, multiple veins are involved, leading to extensive unilateral PHI or to a much rarer bilateral PHI (Bassan et al. 2006, Dudink et al. 2008). The extensive IPL is extremely echoic, shows irregular, feathered borders with the cortex and allows no separation between density and ventricular clot (Perlman et al. 1993, Rademaker et al. 1994). Because PHI carries important prognostic implications (Maitre et al. 2009, Sheehan et al. 2017), classification should be routine. Dudink et al 2008 classified PHI based on venous anatomy and correlated this with outcome. Of course, advanced MRI techniques like DTI and SWI add useful information for prediction of outcome (Roze et al. 2015). Access to MRI is often limited by obvious logistic obstacles in the acute or early subacute phase of PHI. Recognizing the venous subtype of PHI with CUS, rather than labelling the lesion as unspecified PHI, can help the clinician to predict outcome, allowing the start of a targeted rehabilitation program at an early stage, and may enrich the quality of family counseling.  venous infarction types 1 sinus rectus (straight sinus) 2 great cerebral vein of Galen 3 internal cerebral vein 4 terminal (thalamo-striate) vein 5 longitudinal caudate vein 6 medullary veins to caudate collector veins 7 superior choroidal vein 8 direct lateral vein (surface thalamic vein) 9 superior thalamic vein 10 medial atrial vein 11 basal vein of Rosenthal 12 inferior striate vein 13 anterior cerebral vein 14 deep middle cerebral vein (insular vein) 15 inferior ventricle vein 16 inferior choroidal vein 17 lateral mesencephalic vein 18 lateral atrial vein 19 precentral cerebellar vein 20 superior vermis vein 21 inferior sagittal sinus 22 anterior thalamic vein 23 septal vein 24 posterior septal vein 25 superior striate vein location vs su. centralis porus location network injury multi-cavitating effect on PLIC effect on CST catastrophic + late arteriopathy venous infarction: terminal vein typical small and large home delivery limited < direct lateral v. antenatal onset The terminal vein may be replaced by a thalamocaudate vein (= direct lateral vein, surface thalamic vein), which ends in mid part of the ICV (convex summit of ICV) posterior to foramen of Monro; this vein runs almost in a coronal plane and is present in about 4 % of all brains. This vein does not pass near the caudothalamic groove, and as such it might protect against complete terminal vein infarction when present. If the vein leads to infarction, suprainsular location would fit the mechanism. venous infarction: direct lateral vein A group of caudate veins drain deep medullary venous blood from the frontal area along a variable set of vessels; most consistent are the anterior caudate (also called anterior terminal) vein(s), the longitudinal caudate vein, and the transverse caudate vein(s). The anterior caudate veins run in parallel posteromedial arcs along the medial surface of the caudate head. They may be occluded directly or may be congested due to compression of stem collectors, transverse caudate veins, that drain the anterior caudate venous blood to the thalamostriate vein close to its entry into the internal cerebral vein together with the septal vein. The longitudinal caudate vein runs more superiorly and laterally on top of the caudate head. unilateral venous infarction: caudate collector vein extensive plexus ICV bilateral caudate collector veins (Testut and Latarjet 1948 atrial versus temporal hippocampal vein venous infarction: inferior ventricle vein, atrial vein inferior ventricle vein basal vein typical left temporal venous infarction in a preterm infant porencephalisation large atrial GMH with venous infarction atrial infarction, MRI inferior ventricle vein -> postmortem atrial lesion subtle callosal venous lesion venous infarction: septal vein, callosal vein extensive midline haemorrhage The septal vein is a major medial subependymal vein; it collects deep medullary veins from the frontal pole, some blood from the septal leaflet and a few tributaries from the corpus callosum. It inflects at the septal anterior margin, changing direction from anterior and lateral to posterior and medial. This vein is also called the vein of the anterior horn. It usually curves laterally around the columna fornicis and above the foramen of Monro to end in the internal cerebral vein at a site where the thalamostriate and superior choroidal veins converge. Sometimes its point of entry lies more posteriorly on the internal cerebral vein. The septal vein may consist of two major branches, a superior and inferior one; near the fornix both septal veins may converge to end in the internal cerebral vein with one septal vein stem. venous infarction: superior striate vein Preterm infant surviving with extensive striatal haemorrhagic infarction underneath a large caudate GMH. Large parts of caudate and putamen are destroyed in such injury. If only the anterior limb of the internal capsule is affected these children do not develop spastic contralateral hemiplegia.  cavitation absent in striatum large striatal infarction with GMH axial CUS: haemorrhage extends to subinsular cortex A typical venous infarct has a fan shape pointing to the affected collector vein. The infarct has irregular outer margins because of the interdigitation of venous drainage to the internal cerebral vein with veins draining to the pial veins. The affected area is perfusion poor. Pial veins above the infarct may appear dilated.  (three different infants) typical separate GMH and venous infarction SV TV AV atrial vein IVV inferior ventricle vein LCV longitudinal caudate vein    (anterior terminal vein) SV striatal vein TV terminal vein AV LCV IVV venous infarct locations DLV terminal vein to internal cerebral vein U-turn and tributaries 1 superior choroidal vein 2 internal cerebral vein 3 septal vein (in ICV at venous angle or more posterior) 4 thalamostriate vein (terminal vein) 5 anterior thalamic vein 6 superior striatal vein 7 transverse caudate vein 8 direct lateral vein (supra- or retrothalamic)(= thalamo-caudate vein) 9 medial atrial vein 10 superior thalamic vein 11 anterior inferior caudate vein 12 longitudinal caudate vein 13 basal vein 14 great cerebral vein 15 medullary veins venous watershed area ——> transmedullary vein supra-insular DVA Mac OS X  2Û ATTR Ü1Ücom.apple.TextEncodingë com.apple.provenanceöcom.apple.quarantineutf-8;134217984Â.Im0ÖWq/0082;6a26cd3c;Hype4;