Clinical Neuroscience

[CT guided stereotactic radiosurgical treatment of cerebral metastatic tumors]

FEDORCSÁK Imre1, HORVÁTH Ákos2, KONTRA Gábor2, SLOWIK Felicia1, OSZTIE Éva1

JULY 20, 1994

Clinical Neuroscience - 1994;47(07-08)

[Radiosurgery has in recent years been used with promising results in the treatment of cerebral metastases. Between July 1991 and January 1993 we treated 23 patients harbouring brain metastases (39 lesions) with our Linear accelerator based radiosurgery system. The median tumor size was 1.9 cm (1.0-3.0 cm) and the median delivered dose was 18.7 Gy (13–25Gy). Follow up CT scans at 4 months showed a complete remission or greater than 50% tumor volume reduction in 19 patients (82%). No change was noted in 2 patients (9%), and after a transitory decrease an increase in tumor size was seen in 2 patients (9%). Follow up time was minimum 6 month (or till death), and maximum 26 months. We have lost 13 patients during the study, and the cause of death was neurologic in only 2 cases. Our experience supports the cumulating evidence that radiosurgery is an effective treatment for metastatic brain tumors, is well tolerated by the patients, and can be applied also in cases where open surgery can not be performed.]

AFFILIATIONS

  1. Országos Idegsebészeti Tudományos Intézet, Budapest
  2. Országos Onkológiai Intézet, Budapest

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High muscle tone in various muscle groups is typical in Scheuermann's disease, and secondary fibromyalgia often occurs in young adults after this condition. There are clinical observations of emotional-psychological disturbances in adolescents with Scheuermann's osteochondritis. For these reasons it was of interest to determine whether any particular personality traits were manifested in adolescents with Scheuermann's disease, that - in addition to the spinal pathology – would contribute to the high muscle tone. Using four personality diagnostics tests (Brengelmann's questionnaire, Taylor's anxiety scale, Neurosis Scale, Lüscher's 8-colour test) we investigated the emotional life of 52 adolescents with Scheuermann's osteochondritis and that of 52 matched healthy controls. Test results of the two groups were statistically evaluated using chi square tests, with a significance limit of p < 0.05. The most striking difference between the two groups was that the patient's volitional and diffuse psychic tensions were increased (c = 1.00 and p < 0.0005) and, at the same time, were accompanied by a significant deficiency of the means to discharge them ( c = 1.00 and p < 0.0005). The results indicate that Scheuermann-patients do not answer to the stresses of everyday life in the usual way but by an increase in muscle tone. Their muscles act as their stress organ. This - in addition to the spinal pathology - may contribute to the tightness of their muscles and might be considered as a possible predisposing factor to later secondary fibromyalgia. Therapy should seek to interrupt this vicious circle by complementing regular exercise with relaxation techniques.

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Management proposal for the treatment of acute odontoid fractures

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Optimum management of the acute odontoid fracture has always been extensively discussed. Nowadays, with the availability of new operative techniques such as anterior odontoid screw fixation and the posterior C1-C2 transarticular screw fixation the management policy has to be reevaluated. The authors review 115 cases of type II and type III acute odontoid fractures admitted to the National Institute of Traumatology in Budapest between 1980 and 1990. For study purposes a modified Anderson-D'Alonzo classification was introduced allowing a more detailed description of the fracture components and thus enabling to find more clear guidelines for treatment planning. The patients were treated with: a. various types of non-Halo external fixation in 27 cases; b. Halo immobilization in 13 cases; c. various surgical procedures resulting in a loss of atlantoaxial joint function in 22 cases; d. anterior odontoid screw fixation in 53 cases. Modern therapy should be focused on preserving the function of the atlanto-axial joint whenever possible. This can be sufficiently achieved using anterior odontoid screw fixation. However, the main determining factor in the choice of the appropriate treatment - providing the ligaments are intact - is the direction and course of the fracture line. If the fracture line runs horizontal or oblique posterior anterior screw fixation is the most favourable treatment. On the other hand if the fracture line runs oblique anterior Halo immobilization or C1-C2 posterior fixation is the method of choice.

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[B-mode ultrasound images were recorded and densitometrically evaluated from the cervical segment of the carotid arteries of moribund patients. After the death of the patients the bifurcations of the carotis arteries were removed. Water and calcium content of the normal vessel wall, the thrombi and the plaques were determined with tissue drying and with X-ray spectroscopy. Water and calcium content of the pathological lesions were compared to optical density values of the identical location on B-mode images. Calcium content of the plaques were 10 times higher (mean+SD: 35176+44756 ppm.) than that of normal vessel wall (mean+SD: 2728+2660 ppm.). Water content in plaques was 10% lower than in the normal vessel wall. Inverse relationship was found between water- and Ca-content in the normal vessel wall, thrombi and plaques. The autors suggest, that the inverse relationship between water and Ca-content in the thrombi can be explained by the maturation of the thrombi. Densitometric measurements revealed higher optical density (echogenity) in plaques than in thrombi. No correlation was found between Ca- and water content and optical density of plaques. The authors recommend further measurements as calcium content is assumed to correlate with echogenity in plaques with homogenous echostructure.]

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[Background and purpose - Radiosurgery is an increasingly popular treatment option especially for deep eloquent intracerebral cavernomas that are often too risky for surgical removal, but their re-bleed carries significant risk for persisting neurological deficit. Gamma-radiation based radiosurgery has been being available since 2007 in Hungary in Debrecen. Our aim is to summarize our experience accumulated during the first five years of treatment and to compare it to the international experience. Patient selection and methods - We retrospectively analyzed 51 cavernomas in 45 patients treated between 2008 and 2012 in terms of localization, natural history, and the effect of radiosurgery on re-bleed risk and epilepsy, and its side effects. Results - We treated 26.5% deep eloquent (brainstem, thalamic/basal ganglia) and 72.5% superficial hemispheric cavernomas. The median presentation age was 25 years (13-60) for deep, and 45 years (6-67) for superficial cavernomas. They were treated median of 1 year after presentation. 64.5% of deep cavernomas bled before treatment, the annual risk of first hemorrhage was 2%/lesion, re-bleed risk 21.7%, with 44% persisting morbidity. 13.5% of superficial cavernomas bled prior to treatment, the risk of first bleed was 0.3%, there was no re-bleed, and 35% caused epilepsy. We used GammaART-6000TM rotating gamma system for treatment, marginal dose was 14 Gy (10-16), and treatment volume 1.38-1.53 cm3. Re-bleed risk of deep eloquent lesions fell to 4% during the first two years after treatment and to 0% thereafter, and no hemorrhage occurred from superficial lesions after treatment. Persisting morbidity in deep lesions came from adverse radiation effect in 7% and from re-bleed in 7%, and there was no persisting side effect in superficial cavernomas. 87.5% of cases of epilepsy resistant to medical therapy improved. Radiological regression was found in 37.5% and progression in 2% after treatment. Conclusions - Radiosurgery of cavernomas is safe and effective. Early preventive treatment for deep cavernomas carrying high surgical risk is justified. Moreover, for superficial lesions that are surgically easily accessible radiosurgery also appears to be an attractive alternative.]

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[Although still a controversial management option, radiosurgery of intracranial cavernomas has become increasingly popular world-wide during the last decade. Microsurgery is a safe and effective treatment for symptomatic hemispheric cavernomas. However, the indication for microsurgical resection of deep eloquent cavernomas is relatively limited even in experienced hands. The importance of radiosurgery has recently been appreciated in parallel with increasing positive experiences both in terms of effectiveness and safety, especially for cases high risk for surgical resection, in the brainstem, thalamus and basal ganglia. While radiosurgery was earlier indicated mainly for surgically inaccessible lesions that had bled multiple times, a more proactive policy has recently become more accepted. In our opinion preventive treatment with the low morbidity radiosurgery serves the patients’ interest especially for deep eloquent lesions that had bled not more than once, due to the cumulative morbidity of repeated hemorrhages. Despite our increasing knowledge on natural history, there is currently no available treatment algorithm for cavernomas. Arguments for all three treatment modalities (observation, microsurgery and radiosurgery) are established, but their indication criteria are yet to be defined. It is time to organize a prospective population based data collection in Hungary, which appears to be the most realistic way to clarify indication criteria.]