Falxlipom

A fatty falx cerebri is a benign entity in which there is fat within the extradural neural axis compartment located between the two visceral layers of the falx.

Epidemiology

According to one study, it is a common finding seen in approximately 7.3% of patients . This can be more common in older patients .

Clinical presentation

Patients are usually asymptomatic and found incidentally.

Radiographic features

The characteristic finding on both CT and MRI is fat within the falx cerebri.

CT

On CT, there is midline homogenous fat attenuation (hence negative CT attenuation values) in the falx cerebri.

MRI

MRI with and without fat saturation are able to make the diagnosis easily.

Signal characteristics are that of fat:

  • T1: high signal intensity
  • T2: high signal intensity
  • T1 C+ (Gd): no enhancement
  • Fat saturated sequences: low signal

Treatment and prognosis

No treatment is recommended as this is an asymptomatic and incidental finding.

Differential diagnosis

A fatty falx is an incidental finding and should not be mistaken for:

See also

Siehe auch:
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