Ventriculus terminalis cyst in an adult: MR imaging

We report a case of intramedullary cyst within the conus medullaris incidentally found at MR imaging of the lumbar spine in an adult patient complaining of low back pain. The location, signal characteristics, and lack of contrast enhancement of the cyst, in the absence of clinical signs and symptoms related to the spinal cord are diagnostic of ventriculus terminalis cyst and can differentiate it from cystic spinal cord neoplasms