2024年11月5日 · The falx cerebri is a double-fold of dura mater that descends through the interhemispheric fissure in the midline of the brain to separate the two cerebral hemispheres. The falx cerebri is relatively thin anteriorly where it attaches to the crista galli of the ethmoid bone, but is broader posteriorly where it attaches to the superior surface of ...

2024年9月26日 · Ossification of the falx, and to a lesser degree other dural reflections such as the tentorium cerebelli, is increasingly common as individuals age (up to 50% of cases) and is more common in men 10. It is less common in children but nonetheless encountered in up to 5% of children aged 3 to 15 years 10,11 .

Typical appearance of a thin traumatic falx subdural hematoma and low volume sulcal subarachnoid hemorrhage. 3 articles feature images from this case Subdural hemorrhage

Falx cerebri is a midline sickle-shaped fold of the dura mater situated between brain’s two hemispheres. The dura mater, together with the arachnoid mater, covers the entire brain, making it difficult to observe the brain’s underlying grooves and folds.

On CT and MRI, the total absence of the anterior and posterior parts of the falx cerebri at the interhemispheric fissure is suggestive of total agenesis of this structure. Some secondary abnormalities may be seen as a result of absent falx cerebri, such as cerebral gyral interdigitation due to gyri crossing the midline.

To determine the normal appearance of the falx and interhemispheric fissure, 200 consecutive normal CT scans were evaluated prospectively. On unenhanced scans, the normal falx is visualized in 90% of patients and therefore interhemispheric hyperdensity alone should not be considered a sign of subarachnoid hemorrhage.

Correlation with CT scans and/or plain skull films revealed the source to be within areas of ossification of the falx cerebri. The marrow within this ossification may led to high signal, such as is seen within the diploic space of the calvaria and other marrow spaces of the body.

2019年1月1日 · On CT and MRI, the total absence of the anterior and posterior parts of the falx cerebri at the interhemispheric fissure is suggestive of total agenesis of this structure. Some secondary abnormalities may be seen as a result of absent falx cerebri, such as cerebral gyral interdigitation due to gyri crossing the midline.

Calcified falx cerebri. The falx is commonly calcified in adults; If viewed on brain windows only, calcification of the falx can be mistaken for acute intracranial blood; Use of CT 'bone windows' show calcification of the falx more clearly

The superior sagittal sinus, straight sinus, and falx cerebri are identified on unenhanced CT scans of pediatric patients without clinical or radiographic evidence of trauma, subarachnoid hemorrhage, bleeding diathesis, or other abnormalities.