Ossifikationen der Falx

Ossifikationen
in der Falx: Man erkennt in der CT deutlich auch Markraum, der in der MRT (T1 nativ koronar) hyperintens, also fetthaltig zur Darstellung kommt. Bei reinen Verkalkungen ist dies nicht zu sehen.
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Ossikationen
in der Falx: Im Gegensatz zu amorphen Verkalkungen sind Kortikalis und Spongiosa eindeutig als solche zu erkennen.
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Falx-Ossifikationen
an typischer Stelle in der Computertomografie. Die Ausdifferenzierung in Markraum und Kortikalis kennzeichnet die Ossifikation gegenüber einer amorphen Verkalkung.
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What to think
about an ossified falx cerebri?. The CT scan on axial view shows on the cerebral falx the presence of tissue with the same radiological characteristic of adjacent skull bone.
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Ossifikation
der Falx. Man erkennt die Differenzierung in Kortikalis und Spongiosa. Solche Ossifikationen kommen (wie hier 18 Jahre) durchaus auch schon bei jungen Menschen vor. Die frontale Lokalisation ist typisch.
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Falx-Ossifikation
in der Computertomographie in 3 Ebenen (axial, coronar, sagittal).
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What to think
about an ossified falx cerebri?. The falx cerebri ossification on a sagittal CT view reconstruction
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What to think
about an ossified falx cerebri?. The falx cerebri ossification on a coronal CT view reconstruction
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What to think
about an ossified falx cerebri?. This scout image, obtained before the CT acquisition, can be similar to a skull x-ray image.
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What to think
about an ossified falx cerebri?. 3D reconstruction demonstrates the extension of the falx ossification
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In discussing mineralization of the falx cerebri, many radiology textbooks use the term falx calcification and make no mention of falx ossification.

Epidemiology

Ossification of dural folds is relatively unusual; one study suggested a prevalence of falx ossification of 0.7% . Even though, ossification of an isolated site of the falx cerebri is very rare in medical literature .

None of the available literature had mentioned whether the gender or ethnicity plays any role in falx ossification.

Associations

Incidence of falcine ossification has been reported in certain medical disorders such as :

Pathology

Since the falx cerebri is derived from embryonic mesenchymal cells, occasional ossification might be seen due to friction, hemorrhage, or trauma, which results in some osteogenic changes leading to the formation of membranous bone.

Radiographic features

CT

CT scan can clearly distinguish an isolated ossification of the falx from ossification that has spread to the falx from the frontal bone .

MRI

On magnetic resonance images, falx ossification exhibits a typical appearance consisting of a central marrow-containing portion with signal intensity similar to fat (bright on T1), surrounded by low signal intensity representing cortical bone .

Differential diagnosis

There is no difficulty identifying the ossification process on CT images, nevertheless on MRI images some differentials should be considered:

See also

Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Ossifikationen der Falx:
Falxlipom
 
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Verkalkung
versus Ossifikation
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