Variations of the cerebral dural sinuses at the torcular herophili

Kaplan, Harry A.; Browder, Jefferson; Knightly, John J; Rush, Benjamin F.; Browder, Ann A.

doi:10.1016/0002-9610(72)90066-9

Cited by 35 publications

(17 citation statements)

References 16 publications

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“…7,18,19,22 Browder et al assessed 131 specimens and found no two identical venous channel patterns in the TC, whereas duplication of the main SS trunk occurred in all of its three (anterior, middle, or posterior) portions. 7 In our study, the presence of a septum in at least one SS portion was found in 9 of 22 samples (40.90%), alternatively located in any portion.…”

Section: Discussion Morphological Findingsmentioning

confidence: 99%

Straight sinus: ultrastructural analysis aimed at surgical tumor resection

Amato¹,

Tirapelli

Carlotti³

et al. 2016

JNS

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OBJECTIVE Accurate knowledge of the anatomy of the straight sinus (SS) is relevant for surgical purposes. During one surgical procedure involving the removal of part of the SS wall, the authors observed that the venous blood flow was maintained in the SS, possibly through a vein-like structure within the dural sinus or dural multiple layers. This observation and its divergence from descriptions of the histological features of the SS walls motivated the present study. The authors aimed to investigate whether it is possible to dissect the SS walls while keeping the lumen intact, and to describe the histological and ultrastructural composition of the SS wall. METHODS A total of 22 cadaveric specimens were used. The SS was divided into three portions: anterior, middle, and posterior. The characteristics of the SS walls were analyzed, and the feasibility of dissecting them while keeping the SS lumen intact was assessed. The thickness and the number of collagen fibers and other tissues in the SS walls were compared with the same variables in other venous sinuses. Masson's trichrome and Verhoeff's stains were used to assess collagen and elastic fibers, respectively. The data were analyzed using Zeiss image analysis software (KS400). RESULTS A vein-like structure independent of the SS walls was found in at least one of the portions of the SS in 8 of 22 samples (36.36%). The inferior wall could be delaminated in at least one portion in 21 of 22 samples (95.45%), whereas the lateral walls could seldom be delaminated. The inferior wall of the SS was thicker (p < 0.05) and exhibited less collagen and greater amounts of other tissues—including elastic fibers, connective tissue, blood vessels, and nerve fibers (p < 0.05)—compared with the lateral walls. Transmission electron microscopy revealed the presence of muscle fibers at a level deeper than that of the subendothelial connective tissue in the inferior wall of the SS, extending from its junction with the great cerebral vein to the confluence of sinuses. CONCLUSIONS The presence of a structure within the SS that can maintain the venous blood flow despite the dural wall might be considered an anatomical variation. The greater thickness of the inferior wall of the SS compared with the lateral walls is mainly due to the presence of larger amounts of tissues other than collagen. Delamination of the inferior wall of the SS was mostly possible in its inferior wall, but an attempt to delaminate the lateral walls is not recommended. Ultrastructural assessment corroborated a recent report of the presence of muscle fibers in the inferior wall of the SS.

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Section: Discussion Morphological Findingsmentioning

confidence: 99%

Straight sinus: ultrastructural analysis aimed at surgical tumor resection

Amato¹,

Tirapelli

Carlotti³

et al. 2016

JNS

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“…In most of the population, the right and the left TSs were proportional (58.1% of patients) [7]. Abnormal development of one of the TSs was observed in 5% of cases at autopsy with three being on the left and seven on the right, and the SSS connecting to the opposite TS which was developed [5]. Diversity was also observed in the SSS with drainage to the centre of the CS in 58.1% (18 of 31) of patients, and in 35.5% (11) drainage into the left TS [7].…”

Section: Patients)mentioning

confidence: 99%

A previously undescribed variant of the confluence of sinuses

et al. 2017

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“…Kaplan et al (1973) and Browder and Kaplan (1976) found no traces of veins in the foramen caecum of children and late embryos, but although the same sample was used in both studies, the data on the ages of their specimens are inconsistent in the two publications (see also Kaplan et al, 1972). It seems likely that their sample included some specimens of 6 to 7 months of gestation, and possibly some < 1-year-old children.…”

Section: Discussionmentioning

confidence: 86%

Mammalian frontal diploic vein and the human foramen caecum

Thewissen

1989

Anat. Rec.

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The course of the frontal diploic vein in the mole Talpa and the tree shrew Tupaia is described and compared to the frontal diploic vein of other mammals. The frontal diploic vein in Talpa and Tupaia connects the dorsal sagittal sinus to the veins of the orbit and has an emissary function. In certain other mammals it has a diploic function and may drain towards the orbit (e.g., Orycteropus) or towards the dorsal sagittal sinus (e.g., Didelphis). The frontal diploic vein of these mammals is not homologous to the vein of the human foramen caecum, but to the human frontal diploic vein. The vein of the foramen caecum is a problematic structure: its incidence in embryos and children is not clear.

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Variations of the cerebral dural sinuses at the torcular herophili

Cited by 35 publications

References 16 publications

Straight sinus: ultrastructural analysis aimed at surgical tumor resection

Straight sinus: ultrastructural analysis aimed at surgical tumor resection

A previously undescribed variant of the confluence of sinuses

Mammalian frontal diploic vein and the human foramen caecum

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