Have Cysts On Lower Back. Getting Severe Pain Down Leg. Ultrasound Done. Looking For Cure
Such small cystic lesion at back are most likely a lipoma. It's size is stable for quite long duration and also it feels smooth , so there is very high chance that it is benign nodule.
You are correct in manner of doing ultrasound. You need to talk with your radiologist to do ultrasonography rather than doing by technician. Your will pick up by a good radiologist.
Another thing , sciatic nerve is very deeply seated . Any superficial lesion will not cause effect on sciatic nerve. Your previous medical history doesn't look related to present condition.
If there is difficulty in repeat ultrasonography then we can opt for advanced imaging like MRI. it will definitely helpful. However its decisions depends on repeat ultrasonography and your physician opinion.
Hope I have answered your query. If you have further concern, please let me know.
Regards.