[en] Since the 1970's, neuroradiology has benefited from significant advances and has become less and less invasive. SALT group (Saint-Anne - Lariboisere - Tenon), created in 1986, treats and follows patients presenting with arteriovenous malformation with surgery, embolization and/or radiosurgery.. Treatment failures and complications are analyzed in order to better define indications and improve techniques of treatment which benefit from advances in equipment and software, as well as in radiobiology and genetics. (author)

[en] The aim of this report is to inform about the technological and clinical evolutions of the radiotherapy in stereotaxic conditions, discipline in rapid expansion, that consists in radiosurgery (irradiation in one time), fractionated stereotaxic radiotherapy (irradiation in several times). these two techniques are used in the brain irradiation, but also for irradiation on small damages everywhere else. It is a field of recent application made possible by the progress of imaging but feasible only on linear accelerators. (N.C.)

[en] The MRI findings in a 6-year-old boy with an astrocytoma of the mesancephalon are reported. A ventriculocisternostomy had been performed in order to reduce the hydrocephalus. At the site of the ventriculocisternostomy, the T2-weighted images showed a low signal in the anterior part of the third ventricle, the interpeduncular and the pontine cistern. This was attributed to CSF flow void. We conclude that MRI can provide information about the precise location and normal functioning of a ventriculocisternostomy. (orig.)

[en] Irradiation increases the rate of thrombolie obliteration of the angioma. The long latency before the onset of thrombo-obliteration means that there is a considerable delay in treatment. Cerebral angiography is considered the gold standard in he follow-up of angiomas in this study, HM scintigraphy was positive in all cases when cerebral angiography showed no radiological improvement, negative when complete obliteration of the angioma occurred, but negative in 5 cases with incomplete obliteration. This preliminary study shows the place of HM scintigraphy in the follow-up of angioma irradiation, in which it revealed the incomplete effect of stereotactic radiosurgery

[en] Short communication

[en] A pathological study of post-mortem specimens has shown that supratentorial tumor growth beyond the outer limit of the target volume was the reason for therapeutic failures following interstitial gamma irradiation. The authors now report on a combination of interstitial curietherapy and external irradiation, the former destroying the core of the tumor and the latter boosting the peripheral dose beyond the core of the lesion, where the curietherapy dose fall-off is sharp. Iridium-192 wires are implanted and left for the period of time necessary to deliver 35,000 Gy at the estimated external limit of the tumor. One or two weeks after the completion of the curietherapy, 5.5 MV X-rays are used for external irradiation, the total dose and fractionation depending on tumor size. Final assessment is not yet possible but significant improvement has been obtained with the therapy of lower grade tumors. (Auth./C.F.)

[en] Imaging plays a considerable role in the diagnosis and pretherapeutic assessment of intracerebral arteriovenous malformations. CT studies allow detection of most of angiomas and of recent hemorrhage. MRI is most sensitive than CT in determining precise location of the lesions and in detecting associated parenchymal abnormalities, especially subacute hemorrhage. Angiography remains the gold standard for the study of the angioarchitecture, the appreciation of the effects on the safe brain vascularisation and the detection of the associated vascular lesions. (authors). 70 refs., 9 figs

No abstract available