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Biomedical subjects

C Landron

Publications and source records attributed to C Landron.

15 recordsLinked to original sources
PubMed2006

Antiphospholipid syndrome in patients with retinal venous occlusion.

INTRODUCTION: We conducted a prospective study to determine the prevalence and the prognosis of antiphospholipid syndrome (APS) in patients with retinal venous occlusion (RVO). PATIENTS: Consecutive patients presenting with retinal vein occlusion were screened for vascular risk factors (diabetes mellitus, hypertension, hyperlipidemia) and for antiphospholipid antibodies (aPL): anticardiolipin (aCL), anti-beta2-glycoprotein I, and lupus anticoagulant. Patients with a serum sample positive for aPL returned at least 6 weeks later for a new screening to determine the prevalence of antiphospholipid syndrome. All patients were followed to determine the outcome. RESULTS: Sixty-eight patients presented with RVO, 16 had vascular risk factors for RVO. After two screenings for aPL, nine cases of antiphospholipid syndrome associated with RVO were diagnosed (13.2%). Eight patients were over age 50 years and none had a previous thrombotic event before RVO. All patients were treated with aspirin (160 mg/day). With a mean follow-up of 26.1+/-8.2 months (range, 16-36 months), there were no recurrences. CONCLUSION: Retinal venous occlusion is multifactorial in origin. In patients aged 50 years and older, without previous thrombotic event, aPL might not be predictive of recurrences and treatment with aspirin might be sufficient. In such patients, the routine screening for aPL does not appear warranted, but a randomized study should be conducted to really ascertain the pathogenic role of aPL and the most appropriate treatment in RVO.

Adult↗
PubMed2005

Concomitant disseminated herpes simplex virus type 2 infection and varicella zoster virus primoinfection in a pregnant woman.

We report the first case of a HSV and VZV coinfection during pregnancy. VZV infection was diagnosed by a seroconversion and PCR. HSV 2 infection was diagnosed by cell culture. The mother and the newborn received no treatment and did not develop any complication. This case report highlights the need for increased surveillance of pregnant women with herpes virus infections.

Adult↗
PubMed2004

[Imported malaria: prevention should strengthened].

INTRODUCTION: The risk of acquiring malaria infection can largely be prevented by the regular use of chemoprophylactic drugs combined with protective measures against mosquito bites. In a retrospective study we had for aim to evaluate the compliance to malaria chemoprophylaxis in patients presenting with malaria infection. METHODS: We analyzed the compliance to the recommended malaria chemoprophylaxis of French travelers hospitalized in a department of infectious diseases because of malaria infection, between January 1999 and December 2003. RESULTS: Eighty-five patients, with a mean age of 34.1 years (16-65) were treated for malaria infection. Seventy-seven were due to Plasmodium falciparum. The outcome was favorable for all patients, despite four severe accesses. Forty-six patients (54%) did not take any chemoprophylaxis (CP), 19 (22%) had an inadequate CP for the risk, 13 (15%) badly complied with intermittent intake of CP and seven (8%) complied well with the recommended malaria CP. Among the 85 patients, 27 (32%) had come to the travelers' consultation and been given recommendations and a recommended malaria CP prescription before traveling. CONCLUSION: These results confirm that the majority of imported malaria cases is a consequence of bad compliance to CP. Understanding user profiles and factors predicting non-compliance may help us to improve pretravel counseling, thereby reducing the risk for travelers to acquire malaria infection.

Adolescent↗
PubMed2003

[Association of systemic diseases and myelodysplastic syndromes. A retrospective study of 14 cases].

CONTEXT: The association of a systemic disease (SD) and a myelodysplastic syndrome (MDS) may not be a coincidence. We report 14 cases. METHODS: A retrospective study was conducted in patients presenting with an MDS, hospitalised between 1989 and 1999, in the search for a concomitant systemic disease. RESULTS: Ninety-seven patients, 61 men and 36 women, with a mean age of 74 +/- 11 years suffered from an MDS and 14 of them a concomitant SD: one nodular periateritis, 2 systemic vascularitis, 2 cutaneous vascularitis, 2 atrophic polychondritis, 4 Gougerot-Sjogrën syndrome, 2 systemic lupus and one cutaneous lupus. The systemic disease did not appear to influence survival. CONCLUSION: It is possible that the association is not a coincidence and therefore an MDS should be searched for when confronted with an SD, so that treatment may be adapted appropriately.

Adrenal Cortex Hormones↗
PubMed2001

Liquid alumina: detailed atomic coordination determined from neutron diffraction data using empirical potential structure refinement.

The neutron scattering structure factor S(N)(Q) for a 40 mg drop of molten alumina (Al2O3) held at 2500 K, using a laser-heated aerodynamic levitation furnace, is measured for the first time. A 1700 atom model of liquid alumina is generated from these data using the technique of empirical potential structural refinement. About 62% of the aluminum sites are 4-fold coordinated, matching the mostly triply coordinated oxygen sites, but some 24% of the aluminum sites are 5-fold coordinated. The octahedral aluminum sites found in crystalline alpha-Al2O3 occur only at the 2% level in liquid alumina.

Journal Article↗