Department for Neurology, University Hospital Dubrava, Zagreb, Croatia.

In order to determine possible differences in serum gangliosides content and composition before and after surgical removal of tumor, gangliosides isolated from preoperative and postoperative sera of patients with brain tumors were analyzed. Serum samples were collected from patients with glioblastoma, meningioma, acoustic neurinoma, haemangioma, oligodendroglioma and astrocytoma, one week before and one week after surgical removal of the tumor. Serum gangliosides were qualitatively and quantitatively analyzed by high performance thin layer chromatography and laser densitometry. Results showed changes of total gangliosides concentrations in analyzed postoperative sera comparing to preoperative sera. There was not a significant difference in ganglioside pattern of preoperative vs. preoperative sera. However, a postoperative decreased proportion of ganglioside GD3 was observed in sera derived from patients with complete tumor removal. The results of this study indicate that comparative quantitative and compositional analysis of both preoperative and postoperative serum gangliosides may provide useful information concerning tumor progression, surgical success and prognosis.

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City of Hope National Medical Center and Beckman Research Institute, Division of Population Sciences & Pediatrics, Duarte, California 91010-3000, USA. supatel@coh.org

BACKGROUND: The IQ declines observed in children treated for brain tumor emerge as “late effects” and are conceptualized as secondary to changes in underlying mental processes, such as attention. Early identification of the underlying changes might help minimize the long-term adverse outcomes. We evaluated the validity of a time-efficient, standardized parent-report measure in identifying attention dysfunction in childhood brain tumor survivors. PROCEDURE: Seventy survivors between ages 6 and 16 who met eligibility criteria and who had completed a standard neuropsychological evaluation were classified into an attention dysfunction group and a non-attention dysfunction group, based on their performance on objective measures of attention. Analysis of covariance was used to evaluate group differences on the widely used, parent report Child Behavioral Checklist (CBCL). RESULTS: Survivors in the attention dysfunction group were reported by their parents as having significantly more attention problems relative to the group without attention dysfunction on objective testing. Furthermore, survivors categorized as having attention dysfunction based on their neuropsychological test scores were reported on the CBCL by their parents as having significantly more social problems compared to the non-attention dysfunction group. CONCLUSIONS: Standardized parent reporting of attention problems shows promise as a screening tool to detect attention dysfunction among survivors of childhood brain tumors. Findings include a strong association of decreased social functioning with attention dysfunction in brain tumor survivors. Furthermore, exploratory data suggest that the behavioral presentation of attention dysfunction in this group may be different from other clinical groups. 2007 Wiley-Liss, Inc

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