@annette50 I have recently been diagnosed with symptomatic Tarlov sacral cysts. They are a type of spinal cyst. Specifically, These are also sometimes called perineural cysts or sacral nerve root cysts They are dilations of the nerve root sheaths and are abnormal sacs filled with cerebrospinal fluid that can cause a progressively painful radiculopathy (nerve pain). They are located most prevalently at the S2, S3 level of the sacrum. The sacrum is a fused triangle-shaped bone comprised of the five sacral vertebrae forming the base of the spine. The five lumbar vertebrae are located just above the sacrum, and the four coccygeal vertebrae are just below the sacrum forming the coccyx or tailbone.
If you do not already have a copy of your MRI reading — I would obtain that. See if it mentions Tarlov or perineural cyst. They are often underreported and poorly understood by much of the medical community. If there is no mention on the reading — you can ask your radiologist to re-review the MRI and specifically ask if there are any Tarlov cysts present. Many radiologists were taught that a Tarlov cyst is a clinically insignificant finding. For many people that is the case. About 5% of the population do have asymptomatic cysts of this type. Only 1% of us have symptomatic Tarlov cysts. An excellent source of information to learn more about symptoms is: https://www.tarlovcystfoundation.org/faqs/