<s>[INST] My medical history over the past few months has been kind of rocky, but the main thing I am concerned about is a finding on an MRI done on my brain. The results say a pineal cyst measuring 4.4x10.5 mm was found with no other abnormalities. My appointment with the neurologist is not until the third. I believe it to be symptomatic. Can you share any knowledge with me about what symptoms these can cause and if it could relate to my dizziness and heavy feeling throughout my legs? Thanks. [/INST] Hi, Thanks for writing in. The MRI brain scan shows a pineal cyst of size 4.4 x 10.5 mm and is small to cause any symptoms. I assure you that a pineal cyst of that size is unlikely to be causing your symptoms. You can have a detailed discussion on that with your neurologist during appointment. In medical literature, there have been less than 50 patients with symptomatic pineal cysts till date. Most of these patients had history of headaches and symptoms concerning vision. Symptoms usually occur when the cyst causes obstruction to the flow of brain fluid causing HY Chat Doctor.  Unless your MRI scan shows features of HY </s>