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Biomedical subjects

M Guillot

Publications and source records attributed to M Guillot.

At least 19 recordsLinked to original sources
PubMed2005

[Recurrent respiratory tract infections: how should we investigate and treat?].

Recurrent respiratory tract infections are a common reason for visits to primary care practitioners or hospital physicians. They are placed at the junction of several medical specialities: paediatrics, ENT, pneumology, allergology, immunology, infectiology. The great diversity of the laboratory tests requested and on the other hand the proposed treatments, are the consequences of the diversity of the patients encountered and the paucity of the evidence based-medicine studies in this setting. The dilemma is how to identify the child for which recurrent respiratory tract infections are the witness of underlying condition, without performing repeated medical examinations, laboratory tests and treatments for normal children for which immunologic development occurs normally. The essential tools are the history analysis, physical examination and few laboratory tests. The other questions are how to include, for these patients, influenza and pneumococcal vaccines in the immunization program and how to assess the benefit/risk ratio and the cost of surgical treatments. This paper presents the thought of an expert group trying to define the situations where biological tests or treatments are useful.

Child↗
PubMed2005

[Hereditary angioneurotic edema: a case report in a 3-year-old child].

Hereditary angioneurotic edema is a dominant autosomal disease (incidence 1/150,000), whose diagnosis is crucial as this condition can lead to fatal asphyxia within minutes. We report the case of a three-year-old girl, misdiagnosed as allergic asthma. Recognition of the syndrome led to adapted care restoring normal family and school life. Pathogenic cascades involved and therapeutic principles of this disease are reviewed.

Adrenergic Agonists↗
PubMed2005

[Varicella, acute postinfectious arteriopathy and cerebral arterial thrombosis in childhood: a unique clinical and etiologic framework to be fully acknowledged].

Acute arteriopathies are the etiological factor of 25% of all the cerebral arterial thrombosis cases in childhood; they give way to ischemic strokes which have specific clinical and radiological features; varicella is the etiologic factor in 60% of the cases; favorable outcome is the rule; physiopathology and treatment remain under discussion.

Acute Disease↗
PubMed2005

Use of an artificial dermis (Integra) for the reconstruction of extensive burn scars in children. About 22 grafts.

We used an artificial dermis (Integra) for the reconstruction of extensive burn scars in children. Integra was initially developed for the primary coverage of acute burns, but several authors report good experiences with Integra for reconstructive surgery. We present a group of 10 children who underwent Integra grafting at 22 different operational sites. Five children received several grafts with Integra. On average, 260 cm(2) per session were grafted. We compared the surface of Integra on the day of grafting and then again on the evaluation day to measure the secondary retraction of the grafts. Complications (infection of Integra, failure of the epidermal graft) were observed in 5 cases. At the final evaluation, 20 grafts were visible. The surface of the Integra graft represented less than 50% of the initial surface in 7 cases, 51-75% in 5 cases and more than 76% in 8 cases. The disadvantages of Integra in reconstructive surgery are that two operative procedures are necessary and the recurrence of contraction seems to be more significant than with full thickness auto grafts. However, Integra has many advantages: the immediate availability of large quantities, the simplicity and reliability of the technique, the pliability and the cosmetic aspect of the resulting coverage. In light of these preliminary results, Integra appears to offer a new alternative for the reconstruction of extensive burn scars in children.

Biocompatible Materials↗
PubMed2003

[Aspergillosis in cystic fibrosis patients].

Allergic bronchopulmonary aspergillosis (ABPA) should be suspected in any CF patient whose pulmonary disease deteriorates precipitously, suddenly or unexpectedly, and has to be correlated to fungal hypersensitivity biological tests. The standard therapeutic approach is based upon systemic corticosteroids. Invasive pulmonary aspergillosis (IPA) may occur mainly but not exclusively in immunosuppressed patients undergoing lung transplantation. New antifungal compounds (Triazoles, Itraconazole, Voriconazole), Echinochandins (Caspofungin) are effective, synergistic, well tolerated, should their contraindications and side effects be carefully respected and monitored.

Aspergillosis↗
PubMed2002

Phase I study of weekly CPT-11 (irinotecan)/docetaxel in patients with advanced solid tumors.

Based on the synergistic cytotoxicity demonstrated in vitro by topoisomerase I inhibitors followed by docetaxel and the feasibility of giving both drugs on a weekly schedule avoiding overlapping toxicities, we designed a phase I trial of weekly CPT-11 (irinotecan)/docetaxel to determine the dose-limiting toxicities (DLT) and the maximum-tolerated dose (MTD) of this combination. Eighteen patients with advanced solid tumors treated with at least one prior chemotherapy regimen were included in this trial. CPT-11 was administered as a 90-min (intravenous) IV infusion followed immediately by docetaxel as a 30-min IV infusion. Both drugs were given on days 1, 8 and 15 in 4-week cycles. Four escalating dose levels of CPT-11/docetaxel (level I: 60/20 mg/m(2), level II: 60/25 mg/m(2), level III: 70/25 mg/m(2), and level IV: 70/30 mg/m(2)) were studied. Forty-seven cycles were administered (range, 1-5 courses) with a median number of 2.6 cycles per patient. Grade 4 leukopenia was the DLT reached at dose-level IV (CPT-11/docetaxel 70/30 mg/m(2)). Four patients had grade 3 anemia at dose levels III (two patients) and IV (two patients), while grade 3/4 thrombocytopenia was not seen. Grade 3/4 non-hematologic toxicities included grade 3 diarrhea in two patients (dose levels II and IV), grade 3 asthenia in one patient (dose level II) and grade 3 stomatitis in one patient (dose level I). The recommended dose of this weekly schedule is CPT-11 70 mg/m(2) and docetaxel 25 mg/m(2). DLT of this regimen is leukopenia, although toxicity is manageable at the recommended dose level. The activity of this regimen is being evaluated in a phase II study in previously treated patients with advanced non-small cell lung cancer.

Adult↗
PubMed2002

[Home environment and acute propylene glycol intoxication in a two-year old. An unusual case report].

BACKGROUND: Acute propylene glycol intoxication in a two-year-old toddler underlines the potentially serious toxicity in children of this chemical agent present as a diluent in many drugs and environmental products such as cosmetics, diapers, cleansing towels, despite a common consideration of safety and lack of toxicity. CASE REPORT: A two-years-old boy previously healthy was found in the morning by his parents in his cradle, lethargic, responsive only to sharp pain. On admission, vital signs were: temperature 38.5 degrees C, lethargy, polypnea; propylene glycol intoxication through disposable cleansing towels chewing was ascertained by anamnesis and blood urine analyses which revealed metabolic acidosis and serum propylene glycol peak. CONCLUSION: Environmental acute propylene glycol intoxication must be considered and searched for in front of a metabolic acidosis case of unknown origin in children.

Acidosis↗
PubMed2002

[Effect of pelvic member abduction on the kinematics of the thoracic and lumbar spine].

The motion of thoracic and lumbar spine segments has been analysed by mean of the skin landmarks method on 14 volunteers (7 males, 7 females). Results demonstrate that: There is no significant difference between male and female. There is either facilitation, or limitation of the motion of the characteristic landmarks of the spinal segments during trunk motion in perpendicular planes. The mobility of the spinal segments is associated with pelvic girdle motion in order to obtain the planed amplitude, and varies with hips abduction. The analysis of the precise mechanisms of relaxing or stretching of the pelvi-spinal musculo-ligamentous structures constitutes a large field of investigation that necessitates the study of other pelvic limbs postures and needs the use of robotic techniques.

Adult↗
PubMed2001

Prognostic value of K-ras mutations and allelic imbalance on chromosome 18q in patients with resected colorectal cancer.

PURPOSE: We designed this study to assess the frequency of K-ras mutations in patients with resected colorectal tumors and their association with survival. A second objective was to analyze the prognostic value of different K-ras genotypes. In a subgroup of patients we also investigated the presence of allelic imbalance on chromosome 18q and its relationship to clinical outcome. METHODS: One hundred fourteen colorectal tumors resected between 1983 and 1986 were analyzed to detect K-ras point mutations at codons 12, 13, and 61 by polymerase chain reaction followed by allele specific oligonucleotide hybridization. A subgroup of 77 tumors was further screened to detect loss of heterozygosity on chromosome 18q using three polymorphic microsatellite markers (D18S67, D18S474 and D18S58). RESULTS: K-ras mutations were detected in 29 percent (33/114) of patients. K-ras mutations correlated with age and preoperative carcinoembryonic antigen levels, and there was some indication that they may be linked to poor survival, especially in Stage II tumors, where a subgroup of patients with aspartic and serine mutations showed significantly reduced survival (P = 0.03) compared with K-ras-negative patients. 18q loss of heterozygosity was present in 39 percent (25/63) of tumors. A multivariate analysis of Stage II tumors showed that 18q loss of heterozygosity was significantly associated with a worse prognosis (P = 0.006). A significant decrease in survival was identified in ten patients harboring both genetic alterations (K-i mutations and 18q loss of heterozygosity; P = 0.02). CONCLUSIONS: In colorectal tumors, K-ras mutations and 18q loss of heterozygosity are two genetic markers which may identify patients with more aggressive behavior, mainly in Stage II tumors. These findings warrant further research, because they can be useful in customizing adjuvant chemotherapy.

Allelic Imbalance↗
PubMed2001

Influence of the mode of load carriage on the static posture of the pelvic girdle and the thoracic and lumbar spine in vivo.

The influence of various modes of carrying a load of 16 kg (15.69 DaN) on the static positioning of the pelvic girdle and the thoracic and lumbar segments of the spine was examined in seven male subjects. The displacement of cutaneous markers attached to easily palpable skeletal landmarks was recorded using 4 CCD cameras; the data acquired were analysed using an optoelectronic technique (SAGA3). The subjects stood upright on an AMTI biomechanical force platform, from which the ground reaction forces enabled displacements of the centre of gravity axis and thus the moment of the mass carried to be determined. The modes of load carriage examined were: 1) in a case in the left hand; 2) in a case in the right hand; 3) equally in two cases; 4) on the head; 5) in a rucksack; and 6) in an anterior bag. The results showed displacements of the pelvic girdle, the caudal and cranial lumbar segments, and the caudal and cranial thoracic segments in the three orthogonal planes (sagittal, frontal and transverse). The influence of the moment created by the load was seen in the statokinesigrams. The use of external markers using an optoelectronic technique, in association with the ground reaction forces, enables the mode of load carriage to be determined. The results show that the influence of the moment exerted by the mode of load carriage on the gravity axis has important ergonomic consequences.

Adult↗
PubMed2001

[Osteogenesis imperfecta: a new, early therapeutic approach with biphosphonates. A case report].

UNLABELLED: Management of type III osteogenesis imperfecta (O.I.) (brittle bone disease) is primarily supportive; early introduction of cyclic intravenous pamidronate administration in children younger than 2 years of age is an innovative and promising therapeutic approach. CASE REPORT: We present the case of a 6-month-old infant, whose preliminary data have already been partly published, with severe type III O.I. referred because of aching and crumbling from multiple fractures. Cyclic intravenous disodic pamidronate administration improved the clinical status (fracture incidence, pain, growth curve) and biological status (bone density, osseous alkaline phosphatases, urinary desoxypiridoline excretion), allowing a remarkable recovery. CONCLUSION: Biphosphonates are a new and innovative therapeutic agent in O.I. Clinical safety, easy administration, and overall efficacy are likely to extend their use in severe type III O.I. from the very first months of life, the time of best efficacy.

Age Factors↗
PubMed2001

[Pseudotumoral presentation of cat scratch disease].

BACKGROUND: A frequent cause of chronic benign lymphadenopathy, cat-scratch disease (CSD) occurs mainly in children and young adults. Bartonella henselae is the agent responsible for CSD. The most common symptoms of the disease are regional lymphadenopathy and fever. Atypical forms occur in about 10% of patients; among them, CSD may initially present as a tumor. CASE REPORT: A 4-year-old child developed a 'tumor' of the arm with fever. The values of white blood cell count and CRP were normal. Ultrasonography, MRI and arteriography did not contribute to the diagnosis, which was established on histologic examination and serologic test for infection with B. henselae. The outcome was favorable with antibiotic treatment. CONCLUSION: In case of tumor of the limbs, cat-scratch disease should be searched for.

Anti-Bacterial Agents↗
PubMed2001

[Haemophilus influenzae bacterial meningitis: residual risk; case report].

UNLABELLED: Bacterial meningitis due to Haemophilus influenzae has become a rare, albeit not exceptional occurrence since generalized vaccination against that pathogen was instated, concerning as well incapsulated b and non-b Haemophilus influenzae strains, as non-incapsulated strains. CASE REPORT: A 19-month-old fully immunized infant was referred to our hospital for bacterial meningitis. CSF analysis elicited biotype III, non-incapsulated Haemophilus influenzae. CONCLUSION: Generalizing Haemophilus influenzae preventive inoculation has revolutionized the epidemiology of bacterial meningitis; however, a residual risk exists, which deserves to be taken into account.

Female↗
PubMed2001

[Evaluation of diagnosis and follow-up in screened children with cystic fibrosis in Normandy].

The neonatal screening programme in Normandy (France) allowed the formation of a homogenous cystic fibrosis (CF) cohort of 150 children diagnosed between 1980 and 1997. At the time of this retrospective study, 11 were deceased, out of which nine had meconium ileus (eight deaths after surgery, one at 5 years of age). Sixty children born between 1980 and 1993 in the Basse-Normandie region were followed up during a mean 80 months following similar protocols. The mean age at diagnosis was 41 days (SD = 27 d) for infants without meconium ileus. The occurrence of Pseudomonas aeruginosa (P. aeruginosa) infection and chronic colonization was studied using a monovariate followed by a multivariate analysis including the following variables: sex; meconium ileus; anthropometric data at birth and at diagnosis; pancreatic insufficiency; radiological data (Brasfield score); microbiology data at diagnosis; and genetic data. P. aeruginosa infection appeared earlier in children with pancreatic insufficiency (OR = 2.2; p < 0.05) or with radiological abnormalities (Brasfield score < 21) at diagnosis (OR = 3.9; p < 0.05). Meconium ileus (OR = 5.3; p < 0.01), pancreatic insufficiency (OR = 3.8; p < 0.01) and Brasfield score < 21 at diagnosis (OR = 5.6; p < 0.001) were prognosis factors for early chronic P. aeruginosa colonization. In CF children without meconium ileus, the major risk factor found through multivariate analysis for earlier infection and for earlier chronic colonization by P. aeruginosa was a diagnosis delay > 40 days (respectively OR = 4.6; p < 0.001 and OR = 10.4; p < 0.005). These results must be compared with the lower Brasfield score at diagnosis in infants diagnosed after 40 days of life (p < 0.01).

Adolescent↗