Objective: A clear definition of cauda equina syndrome (CES) following herniated discs was not available from the literature. Some define CES as a total paralysis of the pelvic viscera1 while others consider any dysfunction as sufficient evidence of CES2. An extensive search of the literature also demonstrated a lack of a disease specific outcome measure for CES. We aimed to classify CES in the above spectrum and validate a new outcome score for CES.

Design and subjects: We present a retrospective study of 38 patients with a minimum of one-year follow up who presented with an acute cauda equina syndrome. We categorized the patients as complete or incomplete and further sub-classified them as acute or chronic. A total paralysis of the pelvic viscera was considered as complete. Presence of only dysfunction of the pelvic viscera was considered as incomplete. If the presenting episode plateaued within 24 hours or less of onset it was classified as acute and if it plateaued later than 24 hours it was considered as chronic.

Outcome measures: The new 17-item disease specific questionnaire was compared with the Oswestry Disability Index, SF36 and Urodynamic studies.

Results and conclusion: Of the patients studied, 44.7% were complete with acute onset, 21.1% were complete with chronic onset, 10.5% were incomplete with acute onset and 23.7% were incomplete with chronic onset. Outcome score matched the spectrum of our suggested classification.

Objective: To study the long term operative and non-operative outcome in patients with diastematomyelia (DM).

Design: A prospectively acquired database of all spinal patients seen jointly by the senior authors (JKW, JLF), was searched for patients with DM. Their notes and the database were then reviewed.

Subjects: Thirty-six patients were identified; twenty-one (58%) had associated scoliosis. There were 60 associated abnormalities in the 36 patients, most common being ten (27%) with leg length inequality. Twelve patients (33%) had no radiological bony abnormality. Twenty-four (66%) had neurosurgery, eleven (31%) untethering of filum alone and eleven (31%) with removal of a spur and closure of the DM as well. Nineteen (53%) underwent some sort of neuraxial shortening scoliosis correction/surgery. Twenty-eight (78%) were deemed to have a normal/independent neurological outcome, seventeen (61%) having neurosurgery and twelve (43%) scoliosis surgery.

Conclusions: Patients with DM have been followed up for many years. Good neurological outcomes can be anticipated in cases with untethering and with scoliosis correction alone. This series raises the question as to whether any unthethering procedure is necessary in these cases when neuraxial shortening is carried out for scoliosis cases.