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Biomedical subjects

D Legars

Publications and source records attributed to D Legars.

At least 19 recordsLinked to original sources
PubMed2005

[Intra cranial abscess and empyemas from E.N.T. origin].

OBJECTIVES: The purpose of this study was to evaluate the diagnosis criteria, the bacteriology and the evolution after adapted treatment of intracranial abscess of ENT origin. MATERIAL AND METHODS: It was a retrospective study from 1985 to 2003 concerning 22 patients who had brain abscesses secondary to an ENT infection. RESULTS: The infectious origin was sinusoid in 32% of cases, otologic in 32% of cases, pharyngeal or dental in 27% of cases and cutaneous in 9% of cases. The clinical symptoms were: fever in 55% of cases, headache in 73% of cases (Intra cranial hypertension syndrome in 23% of cases), epilepsy in 32% of cases and various other neurologic symptoms. Bacteria were identified in 82% of cases. In 50% of cases multibacterial associations were found. All the patients had bi antibiotherapy associated to surgical excision of the abscess (16 cases) or single (or more) punction (stereotaxic guided or not) of the abscess. 3 patients (14%) died and 50% are alive and well. CONCLUSION: The diagnosis of cerebral abscess is often difficult. The "classical" intracranial hypertension associated to high fever is usually incomplete and sometimes absent. There is no predominant bacteria involved and multibacterial infections are frequent. Despite abscesses are serious and potentially lethal, an early diagnosis, a medical (antibiotics) and surgical treatment (punction and/or surgical excision) may completely be cured in more than 50% of cases.

Adolescent↗
PubMed2004

[Spontaneous otorrhea involving defects of the tegmentum tympani].

OBJECTIVE: We report two cases and a review of the literature concerning spontaneous otoliquorrhea involving congenital bone defects of the tegmen tympani. CASE REPORTS: Both patients were managed by a cooperative otological and neurosurgical team. Otological symptoms predominated. The bilateral bone defects of the tegmen tympani were highlighted by high-resolution computed tomography. Surgery was undertaken via the middle fossa approach. DISCUSSION: Spontaneous cerebrospinal fluid otorrhea related to tegmen tympani defects is rare. It occurs in adults with no previous otological history. The anomaly is congenital. Otological symptoms (differential diagnosis with serous media otitis) are usually predominant. Infectious meningitis may occur. The diagnosis is based on high resolution computed tomography and surgical treatment is required. Numerous technical approaches are possible (transmastoid and/or middle fossa approach) depending on the extent of the defect. Complete recovery is usual after adapted surgical treatment.

Aged↗
PubMed2003

The external laryngeal nerve: surgical and anatomic considerations. Report of 50 total thyroidectomies.

This surgical anatomy study aimed to evaluate the possibility of identifying the external laryngeal nerve during thyroid surgery and the possible variations of nerves at risk. Fifty patients underwent total thyroidectomies during a period of 12 months. Using a neurostimulator, the distal motor branch of the external laryngeal nerve was searched. Electrical stimulation of a nervous branch aimed to provoke a global contraction of the cricothyroid in order to identify with certitude the external laryngeal nerve. The external laryngeal nerve was identified in 20% of cases. Its course was, with almost equal frequency, either (1) between the vessels of the superior thyroid pedicle or (2) superficial and anterior to the fascia of the cricothyroid muscle. The external laryngeal nerve is hard to find during thyroid surgery, even with a neurostimulator. It can be vulnerable during thyroid surgery but only in cases of anatomic variations. Searching for the nerve systematically during thyroid surgery does not seem to be useful. Several precautions when dissecting the superior pole of the thyroid gland seem to be necessary and sufficient to respect the external laryngeal nerve.

Adult↗
PubMed2003

[Lenticulostriate aneurysms. Radioclinical study].

The authors report four cases of aneurysm of the lenticulostriate arteries, three idiopathic and one with underlying MoyaMoya disease. This unusual pathology, which often affects young patients, is revealed by a meningeal syndrome and sometimes focal neurological signs. The bleeding is highlighted by a CT scan without contrast injection, even by MRI, these examinations making it possible to evaluate its repercussion. Arteriography or MRA show the aneurysm and eliminate vascular malformation. According to literature (15 cases published) and our experience, considering the difficulty of a surgical or endovascular approach, morbidity and the frequency of spontaneous thromboses, it seems that a conservative management is justified after a negative etiologic check-up and under radio-clinical monitoring.

Adult↗
PubMed2001

Pediatric cerebral aneurysms.

OBJECT: The exceptional pediatric aneurysm can be distinguished from its adult counterpart by its location and size; however, patient outcomes remain difficult to evaluate based on the published literature. METHODS: Twenty-two children, all consecutively treated in three neurosurgery departments, were included in this study. Each patient's preoperative status was determined according to the Hunt and Hess classification. Routine computerized tomography scanning and angiography were performed in all children on the 10th postoperative day. Each patient's clinical status was evaluated 2 to 10 years postoperatively by applying the Glasgow Outcome Scale (GOS). Twenty-one children presented with a subarachnoid hemorrhage (SAH) and one child harbored an asymptomatic giant aneurysm. Thirteen patients were in good preoperative grade (Hunt and Hess Grades I to III) and eight in poor preoperative grade (Hunt and Hess Grade IV or V). The symptomatic aneurysms were located on the internal carotid artery bifurcation (36.4%); middle cerebral artery (36.4%), half of which were found on the distal portion; anterior communicating artery (18.2%); and within the vertebrobasilar system (9.1%). A giant aneurysm was observed in 14% of patients. Overall outcome was favorable (GOS Score 5) in 14 children (63.6%) and death occurred in five (22.7%). Causes of unfavorable outcome included the initial SAH in four children, a complication in procedure in three children, and edema in one child. CONCLUSIONS: Pediatric aneurysms have a specific distribution unlike that of aneurysms in the adult population. The incidence of giant aneurysms and outcomes were similar to those in the adult population. The major cause of poor outcome was the initial SAH, in particular, the high proportion of rebleeding possibly due to a delay in diagnosis.

Adolescent↗
PubMed1996

When is spinal fusion warranted in degenerative lumbar spinal stenosis?

This study, conducted by a group of neurosurgeons who devote a large portion of their professional time to the treatment of degenerative lumbar spine lesions, was prompted by the dramatic increase in the number of lumbar spinal fusion procedures performed over the last few years in a broad spectrum of disorders ranging from chronic incapacitating low back pain to lumbar spinal stenosis. In the authors' experience, lumbar spinal fusion is rarely warranted and often of dubious efficacy. To investigate this contradiction, the authors reviewed the medical literature on lumbar spinal fusion for the treatment of degenerative spinal stenosis. They have defined lumbar instability as objectively as possible, reviewed clinical and roentgenographic features, described spinal fusion techniques with the drawbacks of each, and evaluated outcomes of surgery for degenerative lumbar spinal stenosis with or without fusion. Findings demonstrate that spinal fusion is a technique of unproven benefit that should be used only in carefully selected patients until results of reliable, prospective, comparative clinical trials become available. In the authors' opinion lumbar spinal fusion should be used as the first-line treatment only in young patients with clinical manifestations directly related to lumbar instability as defined in this study, when decompression requires removal of both facet joints and of the disk (which is rarely the case) or when simple decompression is followed by a recurrence of symptoms ascribable to worsening vertebral slippage.

Adult↗
PubMed1990

Primary lymphoma of the central nervous system. An unresolved therapeutic problem.

From January 1979 to December 1987, 35 cases of primary central nervous system lymphoma (CNS-L) were treated. We recently reviewed these cases focusing on treatment results, treatment modalities, and radiotherapy (RT) or chemotherapy-radiotherapy (CT-RT). Variables such as age, risk factors, presenting symptoms, and histologic condition (all were high-grade or intermediate-grade non-Hodgkin's lymphomas [NHL]) and radiologic data were similar to those of series reported previously. The median survival time was 36 months (+/- 0.2 months) and the disease-free survival (DFS) time was 16 months (+/- 0.12 months). Twelve of 32 patients evaluable for treatment results experienced a recurrence (all but one occurred in the CNS). The DFS rate was 70% for the CT-RT group and 50% for the RT group (median follow-up time, 24 months). Therapeutic results in CNS-L are discussed with special emphasis on a putative role of CT in the management of this rare type of tumor.

Adolescent↗
PubMed1976

[Descriptive anatomy of the posterior root of the trigeminal nerve (preliminary study)].

By 25 dissections, an angulation of 40 degrees at the emergency of the trigeminal nerve was observed. To the three types of fibers described by SICARD, a fourth type is added of V2 fibers wrapped by cranio-median and caudo-lateral fibres. Two groups form the motor root, a postero-superior group and an antero-inferior group. Anastomoses exist between the motor and sensitive roots as well as a few unusual sensitive rootlets.

Humans↗