question: Hello doctor, 4 years old had an MRI for hearing loss. The report impression: Left mastoid and middle ear effusion. But my question is they listed left frontal region arachnoid cyst with adjacent mass effect. They are getting another MRI ordered and an appointment with a neurologist. I have looked at the symptoms, she has none, except dizziness when going in circles, she does not like it. Unknown from fluid in ear or cyst. Can you please give me some information of what this is? I cannot sleep.