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[Risk factors for surgical treatment of supratentorial cerebral arterio-venous angiomas].

The authors present the influence of the selected risk factors in surgical treatment of supratentorial cerebral arterio-venous angiomas. The material represents 38 patients treated in the Neurosurgical Department Collegium Medicum of the Jagiellonian University in the last decade. In 28 of the patients the first sign of angioma was subarachnoid haemorrhage (SAH) and the remaining 10 were revealed with seizures. The assessment of the patients when admitted to the Department was graded using the WFNS scale. The diagnosis was established based on clinical symptoms, the results of computerized tomography and cerebral angiography. The extent of the SAH was graded by the Fisher's scale. The detected angiomas were classified according to the Spetzler scale. All patients were operated on using the microsurgical technique. After occluding the feeding arteries, a selective excision was made into the angiomas and the pathological cerebral tissue. The radical of the operation was controlled by cerebral angiography. The results of the surgical treatment were graded by the modified "outcome" Spetzler scale. The following risk factors were analysed: age, WFNS grade, Fisher's grade and Spetzler's grade. The statistical calculations were made using the chi square test and the Mann-Whitney U-test (p < 0.05). In 7 of the patients the results were very good (18.4%), in 12 the results were good (31.6%), and in 14 the results were bad (36.8%). Five of the patients died (13.2%). There was no statistically significant relationship between the risk factors and the results of treatment of supratentorial cerebral arterio-venous angiomas. In the percentage analysis, the best results were obtained from young patients without SAH and with superficial pattern of venous drainage.