RT Journal Article SR Electronic T1 Lactic dehydrogenase isoenzymes in cerebrospinal fluid of children with Guillain–Barré syndrome JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 255 OP 256 DO 10.1136/adc.87.3.255 VO 87 IS 3 A1 M Nussinovitch A1 D Prais A1 Y Finkelstein A1 D Harel A1 J Amir A1 B Volovitz YR 2002 UL http://adc.bmj.com/content/87/3/255.abstract AB Background: Increased levels of lactic dehydrogenase (LDH) in the cerebrospinal fluid (CSF) have been reported in association with several intracranial pathologies. No studies have been performed on patients with Guillain–Barré syndrome (GBS). Aims: To study LDH isoenzymes in CSF of children with GBS. Methods: CSF samples collected from nine patients with GBS were analysed for total LDH isoenzymes activity, and compared to samples from 15 patients with normal results. Results: Mean total LDH activity was 33.33 (6.63) U/l. All patients had significantly increased LDH-3 isoenzyme compared to controls. LDH-3 was the predominant fraction, accounting for more than 50% of total LDH activity and present in more than twice the percentage of LDH-1 or LDH-2. By contrast, in the control group, there were high percentages of mainly LDH-1 and LDH-2. Conclusions: GBS is apparently associated with a distinct LDH isoenzyme pattern in the CSF. More studies are needed to confirm the rise in LDH-3, as serial CSF analyses are unavailable, and to determine the optimum time of analysis when this finding first becomes detectable.