Search PubMed⌕ Search

Biomedical subjects

G Besson

Publications and source records attributed to G Besson.

At least 91 records · Page 5Linked to original sources
PubMed1978

Extra-dural hematoma of the posterior fossa (author's transl).

10 cases of posterior fossa extra-dural hematoma are reported and 100 other published cases reviewed. It appears that the sole clinical evaluation frequently leads to wrong or delayed diagnosis. In only one out of five cases the cerebellar signs and the palsy of one or several cranial nerves (VII, IX, X, XI, XII) are prominent. In contrast, all other cases do not present specific signs. Furthermore, the presence of a concomitant supratentorial traumatic lesion may contribute to prevent the finding of evidences for cerebellar extra-dural hematoma. The possibility for such hematoma must always been kept in mind when an occipital fracture is shown by radiography. Venous phases in carotid arteriography permit to ascertain the extradural hematoma if there is a displacement of the torcular Herophili or of the transverse sinus. Data from carotid arteriography may be normal and the lesion may be ascertained by vertebral arteriography which will demonstrate: anterior displacement of the basilar artery against the clivus--anterior displacement of posterior inferior cerebellar and posterior meningeal arteries--crescentic displacement of brain substance from the inner table--displacement of the venous sinuses.

Adult↗
PubMed1975

[Selective ventriculography according to the Corrales technique. Its value in the diagnosis of tumors of the 3d ventricle and posterior fossa].

The authors relate their experience of selective ventriculography. The methode previously described by CORRALES needs a small gold chain with fine links which can reach by gravity the cavity of the fourth ventricle through the third ventricle and the aqueduct of Sylvius. This small chain is used as a leader for a flexible catheter which permits selective clouding of median ventricular cavities. This technique was used in 18 patients. In one case only, the small chain went down without any difficulty into the cisterna magna. The ventricular system was normal. In the 17 other cases, the progression of the small chain was stopped at some point of the ventricular cavities. In each of those cases, the stopping of the small chain appeared to be linked with the presence of a growth directly obstructing or compressing the ventricular cavities and gave a first clue as to its location. Introduction of the catheter into the aqueduct of Sylvius was the only true difficulty; in 3 cases, anatomical (large massa intermedia) or pathological obstacle (right angle bending of the aqueduct of Sylvius) made it impossible. In those 3 cases a satisfactory selective clouding of the fourth ventricle was nevertheless obtained by injecting the dimer either into the posterior part of the 3rd ventricle or into the upper part of the aqueduct of Sylvius. In all cases the trouble some superpositions due to clouding of lateral ventricles were thus avoided and a tomographic investigation, specially useful for the diagnosis of expanding lesions of the third ventricle and posterior fossa was allowed.

Brain Neoplasms↗
PubMed1971

"Head yourself".

Explore the source record for details and available documents.

Community Participation↗
PubMedDate not supplied

Risk factors for lacunar infarcts.

Lacunar infarcts represent a stroke subgroup with controversial risk factors. Lacunar syndromes may be divided into two groups: the classic group (pure motor hemiplegia, pure sensory stroke, ataxic hemiparesis, dysarthria-clumsy hand syndrome, sensorimotor stroke) and the miscellaneous group including all other lacunar syndromes. We studied risk factors of 200 consecutive patients with symptomatic lacunar infarcts diagnosed by magnetic resonance imaging. This study tested whether lacunar infarcts represent a homogeneous subgroup of strokes or not. Using descriptive and bivariate statistics, we found that the prevalences of arterial hypertension and cigarette smoking are lower in the miscellaneous group. Analysis of variance shows a significant difference in age between subgroups without interaction of sex. Nevertheless, using multivariate analysis, we did not find a difference between subgroups. Thus, lacunar infarcts seem to be a homogeneous subgroup of strokes, and the miscellaneous group of lacunar infarcts may be included into the lacunar infarct group and not into the vertebrobasilar large-artery infarct group.

Age Distribution↗
PubMedDate not supplied

[Carotid-cavernous fistulas by tearing or rupture of the meningo-hypophysial trunk or of one of its branches. Anatomo-radiologic study of 4 cases. Pathogenic hypotheses].

Thr authors report observations relative to four cases of traumatic carotid-cavernous fistulas for which angiographic pictures were similar. Autopsy examination permitted in two cases to establish that the tentorial branch of the meningo-hypophyseal trunk was involved in the genesis of both fistulas. One case was from a rupture, the other from tearing of that branch. Further examination of these two cases showed an absence of sphenoid bone fracture which suggested that any arterial perforation or shearing process could be excluded. Thus the pathogenic hypothesis of PARKINSON is further sustained. The authors suggest that the observed arterial lesions may be due to tensions occuring at the proximal part of branches of the meningo-hypophyseal trunk. Such tensions may be carried out through tractions on the posterior meningeal walls of the cavernous sinus when trauma occur on the posterior temporal area and the petrous bone. Such traction forces were shown to be real in one case where a fracture of the dorsum sellae and a bilateral caroti-cavernous fistula were caused by a bilateral temporo-petrous trauma.

Adolescent↗
PubMedDate not supplied

[Angiographic signs of extra-dural hematomas of the posterior fossa (author's transl)].

Traumatic subacute and acute extra-dural hematomas of the posterior fossa are infrequent lesions which can be considered as exceptional From 1973 to 1977, we have collected 12 such cases. We performed 11 carotid angiographies and 7 vertebral angiographies in the series. Only in one case among 5 did clinical signs suggested a lesion of the posterior fossa. One of the best clinical elements to suggest such a lesion is the presence of a fracture line that crosses the lateral sinus, which necessitated a complete angiographic study. Arteriographic signs are function of the topography of the hematoma. The carotid angiography reveals only the supratentorial extension of the extra-dural collection of the blood clot. The most frequent sign is a filling defect of the affected sinus. The classic sign of detachment of the torcular is seen only in about 25% of cases. Vertebral angiography shows the existence of an expanding posteroinferior mass of the posterior fossa. Axial views always permits to find the avascular zone which corresponds to the extra-dural collection of the blood clot. In addition, vertebral angiography permits a good study of the sinusal drainage of the posterior fossa. In the purpose to find a supra-tentorial extension the prognosis of the extra-dural hematoma depends on its early discovery. The procedure of choice to make and to confirm such a diagnosis is vertebral angiography and it is not necessary to perform a carotid angiography in the cases where a supra-tentorial lesion does not seen associated.

Acute Disease↗