<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi I had a car accident about 18 months ago and am still having pain have been for a MRI scan which showed l4l5 right peri neural nerve root cyst of 20mm l4 l5 right disc protrusion that incringes upon the thecal sac also l5 S1 para central downward migrated disc hernia encroaching on the emerging S1nerve root Conclusion T12L1 right nerve root sheath cyst L5S1 disc hernia with S1nerve root compromise The conus medullaris ends at L1L2 Fibrolipoma of the filum terminale Could you explain what this means  <response>: Hi, I had gone through your question and understand your concerns. The lesions found by MR scan are of two types: 1. Nerve root cyst at T12L1 and fibrolipoma of film terminal have nothing to do with your accident, but are incidental findings since they didnt gave you symptoms.they have been there before the accident. 2. The cause of your pain is migrated hernia at L5S1 that could have been created after the accident or not. I would suggest that you have to deal with the hernia firstconsult a neurosurgeon, and after that clinical and imaging follow up of cyst and fibrolipoma. Hope this answers your question. Wishing you good health. 