We report on a case of a 26-year-old female with lumbago and right sciatica due to a sacral nerve root cyst. We also review the literature. Sacral nerve root cysts are described in the literature both clinically and pathologically, but failure to evaluate the different characteristics of these cysts has led to a confusion in etiology and terminology. We consider that MR Imaging is useful in diagnosis, and surgery is usually recommended for large cysts which due to their mass effect may cause symptoms.
