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MRI Report need help understanding terminology

As stated in my MRI Report "Within the medial left middle cranial fossa there is an oblique T2 hypertense focus 8x18 mm in size. This appears isointense to CSF signal without enhancement and may be an incidental arachnoid cyst". What is this exactly saying and should I be concerned just would like another opinion along side my primary doctor.
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973741 tn?1342342773
Hello. Please talk to your doctor about your findings. Was it headaches that prompted the MRI? And do you mean hyper INtense? That's a more common term. And it means an area of intensity seen on the imaging. It often implies a lesion and 8 x 18 mm is the size. Now, I'm not reading your results or an expert. This is what you need to ask your doctor about. They may be seeing an arachnoid cyst but these are usually asymptomatic but can cause headache. Since they say 'may be' means they are not sure. Not sure if they will treat 'as if' on that. And when you see incidental, it means it is a finding when an MRI is given for an unrelated reason. CSF is fluid associated with a cyst. When do you see your doctor? What symptoms are you having and why did you get the MRI (I know I already asked).
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Migraines with nausea and vomiting with light looking like it’s flashing, pain in left ear and left side of face, sometimes my left side of face droops, dizziness and vertigo.
And yes I meant hyper intense

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