Mass effect on the right greater than left optic chiasm and cisternal segment of the right optic nerve

What does "Mass effect on the right greater than left optic chiasm and cisternal segment of the right optic nerve" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

This phrase is describing a situation where a growth or mass in the brain is pressing more on the right side than the left side of a structure called the optic chiasm. The optic chiasm is the part of the brain where the optic nerves cross over. The mass is also pressing on a part of the right optic nerve that is located in a fluid-filled space in the brain, known as the cisternal segment.

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