Prise en charge médicale du premier épisode de bronchiolite aiguë des nourrissons de moins de 12 mois hospitalisés au CHU de Cocody de 2020 à 2022 / Medical management of first episode of acute bronchiolitis in children less than 12 months old hospitalized at Cocody University Hospital from 2020 to 2022

Introduction. La bronchiolite aiguë du nourrisson est une infection virale des voies aériennes inférieures qui représente un problème majeur de santé publique. L'objectif de cette étude était de décrire la prise en charge médicale du premier épisode de bronchiolite aiguë au CHU de Cocody. Méthodes. Il s'agissait d'une étude rétrospective à visée descriptive qui a consisté à décrire la prise en charge médicale des nourrissons hospitalisés dans le CHU de Cocody du 1er Janvier 2020 au 31 Décembre 2022. Résultats : Sur la période d'étude, 125 nourrissons sont hospitalisés pour bronchiolite aiguë. La tranche d'âge de 4 à 6 mois était majoritaire (49,6%). L'âge moyen des patients est de 4,7 mois avec des extrêmes de 1 à 12 mois (écart-type=1,277 mois). Le sex-ratio était de 1,27. La numération formule anguine (NFS), la C Reactive Protein (CRP) et la radiographie thoracique standard ont été réalisées chez tous les patients. La désobstruction rhino-pharyngée (DRP) a été pratiquée dans 96,0% des cas. Une nébulisation avec du salbutamol a été appliquée à tous les patients. Cette nébulisation a été associée à une antibiothérapie (71,2 %), une corticothérapie (52 %) et à une kinésithérapie respiratoire (48 %). L'évolution a été favorable dans 96 % des cas, malgré une sous-utilisation de la ventilation non-invasive dans notre dans notre contexte. Conclusion : L'analyse de la prise en charge de la bronchiolite aiguë du nourrisson au CHU de Cocody, a revélé des écarts par rapport aux recommandations de la HAS française. Il serait judicieux d'établir un consensus national adapté à notre contexte de travail.

Acute bronchiolitis in infants is a viral infection of the lower airways that represents a major public health problem. The main objective was to describe the management of this condition in the Ivorian pediatric hospital context. Methods. This was a descriptive cross-sectional study, with retrospective data collection. We have described the care of infants aged 1 month to 12 months, hospitalized for bronchiolitis in the Pediatrics department of the CHU of Cocody from January 01, 2020 to December 31, 2022. Results. We collected 125 files. The age group of 4 to 6 months was the majority (49.6%). The average age of the patients was 4.7 months (ecart-type=1,277 months) with extremes of 1 to 12 months. The sex ratio was 1.27. NFS, CRP and AP chest X-ray were performed in all patients. Nasopharyngeal clearance was performed in 96.0% of cases. The infants were all nebulized with salbutamol. Among them, 52% received a corticosteroid, 71.2% antibiotic therapy and in 48% of cases respiratory physiotherapy was performed. The evolution was favorable in 96% of cases. Conclusion : The analysis of the management of acute bronchiolitis in infants at the Cocody University Hospital reveals deviations from the recommendations of the French HAS. It would be wise to establish a national consensus adapted to our work context.

Seasonality and coinfection of bronchiolitis: epidemiological specificity and consequences in terms of prophylaxis in tropical climate.

OBJECTIVE: To describe the viruses involved, seasonality and coinfection in hospitalised children with suspected bronchiolitis. METHODS: Over the period 1/07/2007 to 31/12/2008, all children hospitalised for bronchiolitis in the paediatric ward were prospectively included, and had respiratory syncytial virus (RSV) screenings. We retrospectively tested all samples for RSVA, RSVB, rhinovirus (RV), human metapneumovirus, parainfluenza 1, 2, 3, 4, influenza A and influenza B. RESULTS: 198 children were tested, and 23% were negative for all viruses. RSVA was predominant in 2008 (64% of all viruses) and RSVB in 2007 (66% of all viruses). RV was frequent during both seasons (24% of all viruses). Flu was not found during the study period. Virus distribution was similar regardless of season or age, and identical to typical patterns in temperate countries. Coinfections were less frequent than in temperate regions because respiratory virus seasons seem to be better separated. The bronchiolitis season started in August and finished in December with a peak in October. CONCLUSION: The specific seasonality of bronchiolitis infection requires palivizumab prophylaxis starting in early July for high-risk infants.

OBJECTIF: Décrire les virus impliqués, la saisonnalité et la coinfection chez les enfants hospitalisés avec une suspicion de bronchiolite. MÉTHODES: Au cours de la période du 01/07/2007 au 31/12/2008, tous les enfants hospitalisés pour bronchiolite dans le service de pédiatrie ont été prospectivement inclus et soumis à un dépistage du virus respiratoire syncytial (VRS). Nous avons testé rétrospectivement tous les échantillons pour RSVA, RSVB, rhinovirus (RV), métapneumovirus humain, Parainfluenza 1, 2, 3, 4, Influenza A, et Influenza B. RÉSULTATS: 198 enfants ont été testés et 23% étaient négatifs pour tous les virus. RSVA était prédominant en 2008 (64% de tous les virus) et RSVB en 2007 (66% de tous les virus). RV était fréquent pendant les deux saisons (24% de tous les virus). La grippe n'a pas été trouvée pendant la période d'étude. La distribution des virus était similaire quelle que soit la saison ou l'âge, et identique aux modèles typiques dans les pays tempérés. Les coinfections étaient moins fréquentes que dans les régions tempérées car les saisons virales respiratoires semblent mieux séparées. La saison des bronchiolites a commencé en août et s'est terminée en décembre avec un pic en octobre. CONCLUSION: La saisonnalité spécifique de l'infection bronchiolite nécessite une prophylaxie au palivizumab débutant en juillet pour les nourrissons à haut risque.

[A case of diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) syndrome]. / Un cas clinique de syndrome d'hyperplasie neuroendocrine pulmonaire diffuse idiopathique (DIPNECH).

INTRODUCTION: DIPNECH is a strictly histological entity according to the WHO 2015 classification and is considered to be at pre-neoplastic risk. It has been proposed that DIPNECH syndrome should be used to describe patients have clinical symptoms, an obstructive ventilatory disorder and compatible radiological abnormalities. The diagnosis is histological and usually based on a surgical lung biopsy. CASE REPORT: We report the case of a 58-year-old woman with a chronic cough for over 20years who had an obstructive airway pattern on spirometry. Diagnoses of asthma and COPD had been discussed. After 7years of follow-up, the DIPNECH hypothesis was evoked on the scanning aspect of mosaic attenuation, expiratory trapping and micronodules, which was subsequently confirmed by surgical pulmonary biopsy. CONCLUSION: It is necessary to consider the possibility of this rare disease in order to avoid inappropriate treatments and in the hope that future therapeutic advances (somatostatin analogs, mTOR inhibitors) improve patients' experience and the progression of respiratory function.

[Respiratory physiotherapy in acute viral bronchiolitis in the newborn. Pro/con arguments]. / La kinésithérapie respiratoire dans la bronchiolite virale aiguë du nourrisson. Arguments pour/contre.

This article reports an exchange of unbiased arguments between Mr Guy Postiaux speaking in favour of respiratory physiotherapy in acute viral bronchiolitis in the newborn and Prof. Jean-Christoph Dubus arguing against. A review of the literature suggests that traditional methods of physiotherapy should be abandoned because they are not validated and because they have harmful side effects. The latest Cochrane revue (2016) suggests the use of slow expiration techniques that have some validated elements and cause no harmful side effects. Large multicentre studies should be undertaken to confirm or refute the results of the five studies in the Cochrane review. Their analysis would allow extraction of objective evidence for the efficacy of slow expiration techniques on the relief of bronchopulmonary obstruction and the reduction of the degree of severity in the short and medium term. Studies of the effect of ambulatory respiratory physiotherapy for bronchiolitis of a moderate degree not requiring hospitalisation are not available. An evaluation is needed which is based on the pathophysiology of multifactorial bronchial obstruction and on the physical signs, of which auscultation is the cornerstone.

Bronchiolitis obliterans organizing pneumonia after stereotactic ablative radiation therapy for lung cancer: A case report.

Bronchiolitis obliterans organizing pneumonia is an interstitial lung disease rarely occurring after radiotherapy probably due to an activation of autoimmune processes. Most cases have been described after postoperative radiotherapy for breast cancer. Corticosteroids represent the main treatment, prognosis is generally favorable. We described a case of bronchiolitis obliterans organizing pneumonia after stereotactic ablative radiation therapy for a recurrent lung cancer. Antibiotics and steroids were administered to solve the clinical picture. After three years, a new lesion at the right lung was found and treated with stereotactic ablative radiation therapy and concomitant long course of steroids with no recurrence of bronchiolitis obliterans organizing pneumonia. Bronchiolitis obliterans organizing pneumonia is a rare event after radiotherapy with undefined risk factors. In our case, steroids played an important role in management and, maybe, in preventing bronchiolitis obliterans organizing pneumonia recurrence after second course of stereotactic ablative radiation therapy.

[Medical prevention and treatment of radiation-induced pulmonary complications]. / Prévention médicale et traitement des complications pulmonaires secondaires à la radiothérapie.

Radiation-induced lung injuries mainly include the (acute or sub-acute) radiation pneumonitis, the lung fibrosis and the bronchiolitis obliterans organizing pneumonia (BOOP). The present review aims at describing the diagnostic process, the current physiopathological knowledge, and the available (non dosimetric) preventive and curative treatments. Radiation-induced lung injury is a diagnosis of exclusion, since clinical, radiological, or biological pathognomonic evidences do not exist. Investigations should necessarily include a thoracic high resolution CT-scan and lung function tests with a diffusing capacity of the lung for carbon monoxide. No treatment ever really showed efficacy to prevent acute radiation-induced lung injury, or to treat radiation-induced lung fibrosis. The most promising drugs in order to prevent radiation-induced lung injury are amifostine, angiotensin-converting-enzyme inhibitors and pentoxifylline. Inhibitors of collagen synthesis are currently tested at a pre-clinical stage to limit the radiation-induced lung fibrosis. Regarding available treatments of radiation-induced pneumonitis, corticoids can be considered the cornerstone. However, no standardized program or guidelines concerning the initial dose and the gradual tapering have been scientifically established. Alternative treatments can be prescribed, based on clinical cases reporting on the efficacy of immunosuppressive drugs. Such data highlight the major role of the lung dosimetric protection in order to efficiently prevent radiation-induced lung injury.

[Radiation-induced bronchiolitis obliterans with organizing pneumonia]. / Complications pulmonaires de la radiothérapie après cancer du sein : penser à la BOOP.

Bronchiolitis obliterans with organizing pneumonia is an inflammatory reaction that can occur as a consequence of various pulmonary affections. Radiotherapy is not the sole and systematic cause of bronchiolitis obliterans with organizing pneumonia. Radiation-induced should not be confused with post-radiation, dose-dependent, inflammatory pulmonary fibrosis, which is non-immunological and located within the irradiation field. The role of immunity, local inflammation and individual radiosensitivity in bronchiolitis obliterans with organizing pneumonia is not well defined. Bronchiolitis obliterans with organizing pneumonia represents 1% of irradiated patients with breast cancer. It results in fever (flu-like symptoms), a rather dry cough and dyspnea. In the post-radiation context, bronchiolitis obliterans with organizing pneumonia may be diagnosed several months and up to a year after breast irradiation. The treatment consists of prolonged steroids or immunosuppressants, which do not prevent chronicity in 15% of patients and death in up to 5% of cases, the remaining 80% of patients healing without sequelae.

[Signs of severity of acute bronchiolitis of the infant]. / Signes de gravité d'une bronchiolite aiguë du nourrisson

Signs of severity of acute bronchiolitis in the infant. About 3% of infants suffering from bronchiolitis will need hospitalization. Criteria to decide are mainly clinical: comorbidities (prematurity, cardiopulmonary pathology, age less than 6 weeks old), intensity of respiratory distress attested by polypnea, toxic aspect, inadequate oral food intake, need for O2 or and socio-familial criteria for confidence in looking for the child.

Signes de gravité d'une bronchiolite aiguë du nourrisson. Environ 3 % des nourrissons atteints de bronchiolite vont être hospitalisés. Les critères de recours hospitalier sont avant tout cliniques et comprennent les terrains à risque (prématurité, pathologie cardiopulmonaire, âge inférieur à 6 semaines), l'intensité de la détresse respiratoire appréciée sur la polypnée, l'altération majeure de l'état général, le retentissement alimentaire, l'oxygénodépendance et les contextes socio-familiaux entravant la surveillance au domicile.

[Cryptogenic organizing pneumonia]. / Pneumopathie organisée cryptogénique.

INTRODUCTION: Organizing pneumonia is a particular type of inflammatory reaction of the lung which gives rise to a clinico-pathological syndrome. It is called "secondary" when a cause such as an infection, a drug toxicity, or a connective tissue disease can be identified, or "cryptogenic" when no cause is identified. The clinical picture is usually characterized by the subacute onset of fever, fatigue, cough and dyspnea, with multiple subpleural areas of consolidation on thoracic imaging. STATE OF THE ART: Organizing pneumonia is characterised by the presence of buds of endoalveolar connective tissue. These result from an injury to the alveolar epithelium, followed by the deposition of fibrin in the alveolar spaces, and the migration of fibroblasts which produce a myxoid endoalveolar matrix. A remarkable feature of organizing pneumonia is the complete disappearance of these endoalveolar buds with corticosteroid treatment, in sharp contrast with what is seen in pulmonary fibrosis. The clinical response to corticosteroids is usually prompt and excellent. Relapses are frequent but usually benign. PERSPECTIVES AND CONCLUSION: As the clinical, imaging and pathological characteristics of organizing pneumonia are now well established, many questions remain unanswered, such as the mechanisms involved in the complete reversibility of the pulmonary lesions, and the role of steroid-sparing treatments such as immunomodulatory macrolides.

[Small airway diseases and immune deficiency]. / Atteinte des voies aériennes distales et immunodépression.

INTRODUCTION: Innate or acquired immune deficiency may show respiratory manifestations, often characterized by small airway involvement. The purpose of this article is to provide an overview of small airway disease across the major causes of immune deficiency. BACKGROUND: In patients with common variable immune deficiency, recurrent lower airway infections may lead to bronchiolitis and bronchiectasis. Follicular and/or granulomatous bronchiolitis of unknown origin may also occur. Bronchiolitis obliterans is the leading cause of death after the first year in patients with lung transplantation. Bronchiolitis obliterans also occurs in patients with allogeneic haematopoietic stem cell transplantation, especially in the context of systemic graft-versus-host disease. VIEWPOINT AND CONCLUSION: Small airway diseases have different clinical expression and pathophysiology across various causes of immune deficiency. A better understanding of small airways disease pathogenesis in these settings may lead to the development of novel targeted therapies.

[Delayed convulsion after lidocaine instillation for bronchoscopy]. / Convulsion tardive après instillation de lidocaïne pour bronchoscopie.

INTRODUCTION: Lidocaine toxicity usually appears rapidly and is directly correlated with plasma concentrations of the drug. CASE REPORT: We report a case of a late neurologic toxicity occurring after instillation of lidocaine during fibre-optic bronchoscopy. A patient with bronchiolitis obliterans underwent a diagnostic bronchoscopy. She received multiples instillations of Xylocaine(®) 2% (lidocaine). Three and a half hours later, she had a tonic-clonic seizure. Seven hours later, this recurred. Lidocaine plasma levels were in the toxic range at the time of the first seizure (18.32µg/mL) with a significant decrease in the concentration noted 24hours later. CONCLUSION: The slow absorption of lidocaine into the blood from the bronchial tree explains the delayed neurologic toxicity. Our observation is a reminder that complications can occur due to high doses of lidocaïne administrated by instillation. Thus, if the recommended dose of lidocaine is exceeded, it is essential to monitor patients closely for a prolonged period, especially those with fibrosing lung disease in order to avoid possible late toxicity.

La cause la plus fréquente de détresse respiratoire et d'hospitalisation.

Bronchiolitis epidemiology. Respiratory syncytial virus is the most important viral pathogen causing acute lower respiratory infection and infants hospitalizations. Other viruses are also identified (métapneumovirus, rhino/enterovirus, coronavirus, influenza, parainfluenza, adenovirus …). The research develops on new therapies and prevention.

Épidémiologie de la bronchiolite aiguë. La bronchiolite à virus respiratoire syncytial est chez le nourrisson la cause la plus fréquente de détresse respiratoire et d'hospitalisation. D'autres virus sont également identifiés (métapneumovirus, rhino/entérovirus, coronavirus, virus para-influenza et influenza, adénovirus…). Les recherches se développent sur la prévention et de nouvelles thérapeutiques.

Aucun n'est recommandé et ne remplace la désobstruction rhino-pharyngée.

Use of inhaled treatments in acute viral bronchiolitis in infants. Inhaled therapies are widely used by practitioners for treating acute viral bronchiolitis. Therefore, their efficacy has a low level of proof that does not sustain their use. Even if they need to be better studied in atopic infants, beta-2 agonists have no effect, excepted side effects. Anticholinergic drugs are not recommended. Adrenaline, despite some positive effects, is not recommended too. Corticosteroids are not useful, both for treating the acute problem and for preventing a possible post-viral asthma. Ribavirine, an antiviral agent, is reserved to very precise indications. At last, hypertonic saline, which has given some hopes, nowadays cumulates negative studies, and is no longer recommended. At all, in 2016, any inhaled treatment is recommended for treating acute viral bronchiolitis in infants..

Place des traitements inhalés dans la bronchiolite aiguë du nourrisson. Les traitements inhalés sont largement proposés en pratique clinique en cas de bronchiolite aiguë du nourrisson. Cependant, les niveaux de preuve d'efficacité sont en défaveur de ces traitements. Même s'ils méritent d'être mieux étudiés chez l'enfant atopique, les bêta-2-agonistes ne semblent pas avoir d'autres effets que latéraux. Les anticholinergiques ne sont pas recommandés. L'adrénaline, même si quelques effets positifs sont notés, non plus. Les corticoïdes ne sont utiles ni en aigu ni en prévention d'un potentiel asthme viral. La ribavirine, agent antiviral, est réservée à des indications très ciblées. Le sérum salé hypertonique, après avoir été un espoir, accumule les études négatives et n'est pas non plus indiqué. Au total, en 2016, aucun traitement inhalé n'est recommandé dans la bronchiolite aiguë du nourrisson.

Les épisodes sifflants de la petite enfance révèlent un terrain à risque d'épisodes ultérieurs.

Risk of persistent asthma following infant bronchiolitis. Repetition of wheezing episodes during early childhood is a risk factor of persistent asthma during childhood, adolescence and young adulthood. Host constitutional factors contribute both to the occurrence of the first wheezing episodes and of their persistence. These factors play a particularly important role in prenatal airway growth. Postnatal factors, inflammatory or environmental, interact with these constitutional factors to modulate the airway caliber and the level of bronchial hyperresponsiveness. A vicious circle is created between persistent symptoms and lung functional alterations that may predispose in the long term to the development of chronic obstructive pulmonary disease.

Épisodes répétitifs de bronchiolite et risque d'asthme. La répétition d'épisodes de dyspnée sifflante durant la petite enfance est un facteur de risque d'asthme persistant au cours de l'enfance, de l'adolescence et chez le jeune adulte. Des facteurs constitutionnels de l'hôte contribuent à la fois à la survenue des premiers épisodes sifflants et à leur persistance. Ces facteurs jouent notamment un rôle important dans la croissance prénatale des voies aériennes. Des facteurs post-natals, inflammatoires ou environnementaux interagissent avec ces facteurs constitutionnels pour moduler le calibre des voies aériennes et le niveau d'hyperréactivité bronchique. Un cercle vicieux se crée entre symptômes persistants et altérations fonctionnelles respiratoires, pouvant prédisposer à long terme au développement d'une broncho-pneumopathie chronique obstructive.

[Environmental causes of the distal airways disease. Hypersensitivity pneumonitis and rare causes]. / L'atteinte des voies aériennes distales d'origine environnementale. Pneumopathie d'hypersensibilité et étiologies rares.

Hypersensitivity pneumonitis is one of the most frequent causes of distal airways disease. It is associated with inflammation of the bronchioles, predominantly by lymphocytic infiltrates, and with granuloma formation causing bronchial obstruction. This inflammation explains the clinical manifestations and the airways obstruction seen on pulmonary function tests, most often in the distal airways but proximal in almost 20%. CT scan abnormalities reflect the lymphocytic infiltrates and air trapping and, in some cases, the presence of emphysema. Bronchiolitis induced by chronic inhalation of mineral particles or acute inhalation of toxic gases (such as NO2) are other examples of small airways damage due to environmental exposure. The pathophysiological mechanisms are different and bronchiolar damage is either exclusive or predominant. Bronchiolitis induced by tobacco smoke exposure, usually classified as interstitial pneumonitis, is easily diagnosed thanks to broncho-alveolar lavage. Its prognosis is linked to the other consequences of tobacco smoke exposure including respiratory insufficiency. Finally, the complex lung exposure observed in some rare cases (such as the World Trade Center fire or during wars) may lead to a less characteristic pattern of small airways disease.

[Acute respiratory failure due to Mycoplasma pneumonia]. / Détresse respiratoire aiguë due à Mycoplasma pneumoniae.

INTRODUCTION: Respiratory infections due to Mycoplasma pneumoniae are typically mild and subacute. We report the case of a 40-year-old man hospitalized for acute respiratory distress in the context of an acute infection with Mycoplasma pneumoniae. Radiological and pulmonary function test were consistent with an acute infectious bronchiolitis. CASE REPORT: The patient presented with isolated respiratory failure with profound hypoxemia requiring oxygen delivered at high concentration by face mask. The CT appearance of the lesions corresponded to a spread of bilateral micro-connected pulmonary nodules (a "tree-in-bud" pattern) associated with obstructive ventilatory disorder. The only pathogen identified by PCR on BAL and serology was Mycoplasma pneumoniae. The evolution was favorable with antibiotic therapy combined with corticosteroids. CONCLUSION: Mycoplasma pneumoniae may be responsible for severe respiratory illness in the form of bronchiolitis. In the setting of severe acute community pneumoniae antibiotic treatment which is also effective against Mycoplasma pneumonia should be considered. In this case, corticosteroids may be an effective adjunct by their action on the small airways.

[Focus on mediastinal Castleman disease]. / Maladie de Castleman médiastinale : mise au point.

Castleman disease is a rare lymph nodes disease whose name covers different clinical presentations. The most frequent histology is the hyaline vascular localized form. In this case, Castleman disease occurs in young adults, and is localized to the mediastinum in one third of the cases. The disease is often asymptomatic, but paraneoplasic pemphigus has been described. The management of this form of Castleman disease is based on complete surgical resection. Perioperative immunomodulating treatments may be discussed in case of paraneoplasic pemphigus, mostly when affecting the bronchial tree.