We report a case of recurrent intraspinal cyst. The patient was a 29-year-old male. His initial complaint was lumbago. Four weeks after onset, lumbago and left sciatica appeared. An epidural mass was detected at L4/5 by MR imaging, myelogram and CTM. In MR imaging, the mass showed low intensity in T1, high intensity in T2 and ringed enhancement effect with gadolinium. The mass was thought to be a synovial cyst or ganglion, but surgical and histological diagnosis was a discal cyst. His pain subsided after surgery, but left sciatica appeared again seventh seven days after the operation. A cyst larger than the first one was found with MR imaging.
