A developmental theory of the superior sagittal sinus(es) in craniopagus twins

Lasjaunias, P.; Kwok, Robert; Goh, Peter; Yeong, Kuan Ying; Lim, Winston Eng Hoe; Chng, Soke Miang

doi:10.1007/s00381-004-1007-2

Cited by 15 publications

(14 citation statements)

References 8 publications

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“…This is confirmed by the study on development of the SSS in craniopagus twins 8 and is also supported by the absence of the SSS in alobar holoprosencephaly. 12 This could explain why the SSS has a different path than the suture.…”

Section: Discussionsupporting

confidence: 74%

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Unilateral coronal synostosis: can we trust the sagittal suture as a landmark for the underlying superior sagittal sinus?

Protzenko¹,

Arnaud²,

Brunelle³

et al. 2016

PED

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OBJECTIVE The sagittal suture is usually considered an external anatomical landmark, indicating the location of the superior sagittal sinus (SSS) for surgical approaches. Children with unilateral coronal synostosis (UCS) often present with an important deviation of the sagittal suture. Because these patients usually undergo frontal reconstruction or even endoscope-assisted minimally invasive procedures, it is imperative to know the location of the SSS. The aim of this investigation was to study the anatomical relationship between the SSS and the sagittal suture in children with anterior plagiocephaly. METHODS The authors retrospectively studied the relationship between the sagittal sinus and the sagittal suture at 5 points: nasion, midpoint nasion-bregma, bregma, midpoint bregma-lambda, and lambda. The study analyzed CT scans of 50 children with UCS admitted to the craniofacial unit of Necker Enfants Malades Hospital between March 2006 and March 2013 and compared them with 50 control children with no evidence of craniosynostosis, bone disease, or genetic syndromes. The authors also analyzed the presence of extracerebral fluid collection and ventricular asymmetry in children with UCS. RESULTS Fifty-six percent of patients had anterior right UCS and 44% had left-sided UCS. Type I UCS was seen in 1 patient, Type IIA in 20 patients, Type IIB in 20 patients, and Type III in 9 patients. The authors found that the nasion is usually deviated to the ipsilateral side of the synostosis, the bregma contralaterally, and the lambda ipsilaterally. The gap distances between the reference point and the SSS were 0–7.3 mm (mean 1.4 mm) at the nasion; 0–16.7 mm (mean 3.8 mm) at the midpoint nasion-bregma; 0–12 mm (mean 5.8 mm) at the bregma; 0–9.5 mm (mean 3 mm) at the midpoint bregma-lambda; and 0–11.6 mm (mean 5.5 mm) at the lambda. Conversely, a discrepancy of more than 1 mm between the SSS and the position of the suture was found only in 7 control cases (14%). Of patients with UCS, 38% presented with an extracerebral fluid collection contralateral to the fused coronal suture. Fifty-two percent had a ventricular asymmetry, which was characterized by reduced ventricular volume ipsilateral to the synostosis in all but 1 patient. CONCLUSIONS In this study, the SSS was usually deviated contralaterally to the closed coronal suture. It tended to be in the midline of the cranial vault and could be projected virtually along an imaginary line passing through the midline of the cranial base. The authors recommend a distance of 37 mm from the sagittal suture as a safety margin during surgery.

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Section: Discussionsupporting

confidence: 74%

“…This could be a limitation of the study. However, the distances found in control groups of other studies 8,16 were still less significant than the distances we found in the UCS group, making our results reliable.…”

Section: Discussioncontrasting

confidence: 55%

Unilateral coronal synostosis: can we trust the sagittal suture as a landmark for the underlying superior sagittal sinus?

Protzenko¹,

Arnaud²,

Brunelle³

et al. 2016

PED

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“…Others have previously postulated that devel-opment of the SSS requires induction from the midline of the telencephalic vesicle, as well as an intact skull. 5 Cranial-placental adhesions are rare but have been documented in the literature. 3,[7][8][9][10][11]13 These cases are described in association with meningoceles, encephaloceles, or major craniofacial defects-all of which were absent in the present case.…”

Section: Discussionmentioning

confidence: 97%

Congenital placental–cerebral adhesion: an unusual case of amniotic band sequence

Merrimen¹,

McNeely²,

Bendor-Samuel³

et al. 2006

Journal of Neurosurgery: Pediatrics

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Amniotic band sequence is a disruption sequence having a broad spectrum of clinical manifestations ranging from partial amputations to major craniofacial and limb-body wall defects. Most reported cases of placental-cerebral adhesion pertain to patients with severe craniofacial defects who were either stillborn or who died a few hours after birth. The authors present a case of a male infant born with a placental-cerebral adhesion through a cranial defect. This adhesion was separated at birth, and duraplasty and primary scalp closure were performed. A detailed examination of the placenta revealed the presence of multiple amniotic bands. The case demonstrates that survival and normal early post-natal development are possible if the condition is treated promptly.

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“…8,9 At the spine and skull, 2 types of bone can be distinguished, the endochondral type (cartilaginous bonevertebral bodies, basioccipital, basisphenoid, and the petromastoid bone) and the intramembranous type (membranous bone-spinous process, laminae, and cranial vault). [13][14][15] The creation of the dorsal midline-located sinuses and confluences is, nevertheless, linked to the falces (cerebri and cerebelli) and the tentorium cerebelli 16 ; both are associated with an epidural confluence and coalescence of the venous vascular spaces at their bony attachment later to become the superior sagittal sinus, medial occipital sinus, and transverse sinuses. 17 Their role in the venous drainage of the paleo-and neocerebrum and paleo-and neocerebellum is a recent phylogenetic acquisition; they will further evolve postnatally after regression of the medial occipital sinus and maturation of the jugular bulbs.…”

Section: Bony Structuresmentioning

confidence: 99%

Dural Arteriovenous Shunts

Geibprasert

Pereira

Krings

et al. 2008

Stroke

Self Cite

201

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Background and Purpose-The craniospinal epidural spaces can be categorized into 3 different compartments related to their specific drainage role of the bone and central nervous system, the ventral epidural, dorsal epidural, and lateral epidural groups. We propose this new classification system for dural arteriovenous shunts and compare demographic, angiographic, and clinical characteristics of dural arteriovenous shunts that develop in these 3 different locations. Methods-Three hundred consecutive cases (159 females, 141 males; mean age: 47 years; range, 0 to 87 years) were reviewed for patient demographics, clinical presentation, multiplicity, presence of cortical and spinal venous reflux, and outflow restrictions and classified into the 3 mentioned groups. Results-The ventral epidural group (nϭ150) showed a female predominance, more benign clinical presentations, lower rate of cortical and spinal venous reflux, and no cortical and spinal venous reflux without restriction of the venous outflow. The dorsal epidural group (nϭ67) had a lower mean age and a higher rate of multiplicity. The lateral epidural group (nϭ63) presented later in life with a male predominance, more aggressive clinical presentations, and cortical and spinal venous reflux without evidence of venous outflow restriction. All differences were statistically significant (PϽ0.001). Conclusion-Dural arteriovenous shunts predictably drain either in pial veins or craniofugally depending on the compartment involved by the dural arteriovenous shunt. Associated conditions (outflow restrictions, high-flow shunts) may change that draining pattern. The significant differences between the groups of the new classification support the hypothesis of biological and/or developmental differences in each epidural region and suggest that dural arteriovenous shunts are a heterogeneous group of diseases.

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A developmental theory of the superior sagittal sinus(es) in craniopagus twins

Cited by 15 publications

References 8 publications

Unilateral coronal synostosis: can we trust the sagittal suture as a landmark for the underlying superior sagittal sinus?

Unilateral coronal synostosis: can we trust the sagittal suture as a landmark for the underlying superior sagittal sinus?

Congenital placental–cerebral adhesion: an unusual case of amniotic band sequence

Dural Arteriovenous Shunts

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