Summary
In order to study survival and identify prognostic factors in progressive supratentorial low grade astrocytoma, 46 cases of diffusely growing glioma (1982–1989), in which stereotactic biopsy revealed a diagnosis of astrocytoma grade II according to Kernohan, were evaluated. Only patients with definite tumour growth on consecutive CT scans were included. All patients received a full course of fractionated radiotherapy. All tumour biopsy specimens were re-evaluated according to both the Kernohan and Daumas-Duport grading systems. Follow-up for at least 5 years showed a median survival of 47.5 months (1 year 71%, 5 year 41%). In Cox' multivariate analysis 4 factors turned out to give the best fitting prognostic model for survival: age, duration of symptoms, preoperative neurological examination and CT-contrast enhancement. Numerical scoring was performed by giving either 1 or 0 for: age > or < 40 years, symptom duration < or > 1 year, presence or absence of focal deficit, and presence or absence of CT-contrast enhancement. Combining these factors in a score ranging from 0–4 resulted in 3 distinct groups with respect to median survival (< 2 ∶ 66.5 months, 2 ∶ 40 months, > 2 ∶ 10 months, P=0.0015). Although 17 cases with Kernohan grade II were upgraded using Daumas-Duport criteria (13 grade III, 4 grade IV), these cases did not form a separate survival-group. Additional parameters are needed to assess prognosis by neuropathological means, as some “low-grade” tumours are less benign than others, giving rise to a variable natural history.
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Schuurman, P.R., Troost, D., Verbeeten, B. et al. 5-Year survival and clinical prognostic factors in progressive supratentorial diffuse “low-grade” astrocytoma: A retrospective analysis of 46 cases. Acta neurochir 139, 2–7 (1997). https://doi.org/10.1007/BF01850860
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DOI: https://doi.org/10.1007/BF01850860