From the case: Mega cisterna magna

CT
a wedge shaped ar...
Axial non-contrast
a wedge shaped area of CSF density in the midline posterior fossa region resting on the inner table of the squamas portion of the occipital bones. Its apex is seen pointing at the cerebellar vermis. A fold of the arachnoid membrane is seen crossing inside the cistern.
Modality: CT (non-contrast)

- “ A mega-cisterna magna, is a controversial subject. In general however, the term refers to non-pathological enlargement of the retro-cerebellar CSF...”

Used in the following article:

  • Mega cisterna magna - “ Mega cisterna magna refers to a normal variant characterised by a truly focal enlargement of the subarachnoid space in the inferior and posterior ...”

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