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Dive into the research topics where C. Adamsbaum is active.

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Featured researches published by C. Adamsbaum.


Joint Bone Spine | 2011

Chronic recurrent multifocal osteomyelitis.

Julien Wipff; C. Adamsbaum; André Kahan; Chantal Job-Deslandre

Chronic recurrent multifocal osteomyelitis (CRMO), also known as chronic nonbacterial osteomyelitis, is an orphan disease that manifests as recurrent flares of inflammatory bone pain with or without a fever. The pain is related to one or more foci of nonbacterial osteomyelitis. To distinguish unifocal CRMO from a tumor or an infection, a bone biopsy is required in nearly all patients and a trial of antibiotic therapy in many. CRMO is now considered the pediatric equivalent of SAPHO syndrome, and recent data suggest that CRMO should be classified among the autoinflammatory diseases. The treatment of CRMO is not standardized. Although no randomized placebo-controlled trials are available, there is general agreement that nonsteroidal antiinflammatory drugs constitute the best first-line treatment and that bisphosphonates and biotherapies such as TNFα antagonists are effective in the most severe forms. Although CRMO is considered a benign disease, recent data suggest an up to 50% rate of residual impairments despite optimal management.


Pediatric Radiology | 2012

Abusive head trauma: don’t overlook bridging vein thrombosis

C. Adamsbaum; Caroline Rambaud

Few paediatric diagnoses generate as much controversy as abusive head trauma (AHT), also known as shaken baby/shaken impact syndrome (or SBS). Major signs such as multifocal subdural haematomas, cerebral injury, retinal haemorrhage and skeletal fractures are exhaustively described in myriad radiological reports, and are the result of extremely violent trauma. While bruises have significant diagnostic value, they may be missed when located in hidden areas like behind the ears and in the axilla. In some cases, subdural haematomas appear to be isolated, with no other apparent signs, making diagnosis difficult. We would like to stress the need for careful vertex screening to look for bridging vein thrombosis, which—as some pathologists have pointed out—has high diagnostic value [1]. The bridging veins are draining veins that arise from the coalescence of the superficial cortical venous network at the midline, within the subarachnoid space. They extend, bridge-like, at intervals along the midline, from their attachment to the arachnoid at the medial border of the cerebral hemispheres to the superior sagittal sinus of the dura mater, into which they flow after having traversed the arachnoid space and the deep layers of the dura mater [2]. These veins constitute a short, non-tortuous, perpendicular pipeline between the


Pediatric Radiology | 2010

How to explore and report children with suspected non-accidental trauma.

C. Adamsbaum; Nathalie Méjean; Valérie Merzoug; Caroline Rey-Salmon

AbstractChild abuse is a controversial problem of special concern. Recent reports have focused on the broad variability of reporting to child protection services. Radiologists play a key role in the early diagnosis and imaging of suspected inflicted injury. Imaging must be performed and then interpreted with rigour.The aims of this review are:nTo review the recent recommended guidelines for imaging in cases of suspicion of abuse. These include a highly detailed complete skeletal survey with centered views, whilst brain CT and/or MRI are mandatory in children younger than 2xa0years. The use of abdominal imaging is debatable if the child has no symptoms. All siblings younger than 2xa0years should be assessed in the same way while the diagnosis of abuse is investigated. Body MRI is an interesting modality that remains a “work-in-progress”.To highlight that dating of both brain and skeletal injuries is imprecise. The main point is, however, to determine if the pattern is of “age-different” lesions. This not only provides a strong argument for the diagnosis of abuse, but also indicates repetitive violence with a high risk for further injury and death.To remember that the medical perspective is to protect the child. Thus, radiologists must communicate clearly the suspicion of abuse and the degree of certainty to clinicians to aid reporting or hospitalization.


Insights Into Imaging | 2011

Pineal cysts in children

V. Lacroix-Boudhrioua; Agnès Linglart; P. Y. Ancel; Céline Falip; Pierre Bougnères; C. Adamsbaum

ObjectiveTo describe the prevalence and characteristics of pineal cysts found on MRI in children.MethodsThis is a retrospective monocentric study of all brain magnetic resonance imaging (MRI) examinations performed under the same technical conditions for checking the idiopathic nature of short stature (ISS group, nu2009=u2009116) and for the investigation of central precocious puberty (CPP) over a 3-year period (nu2009=u200956). Dimensions, wall and septal thickness, number of locules, signal intensity, and the presence of a solid component were analysed. Ten of 19 cysts were re-evaluated (follow-up interval 4–28xa0months). The prevalence of the pineal cysts was compared between the two groups using χ2 and Fisher’s exact tests, and a significance threshold of pu2009<u20090.05.ResultsThe prevalence of cysts was comparable in the two groups, CPP (10.7%) and ISS (11.2%). Cyst characteristics were similar in the two groups and 74% had thin septations. None of the cysts changed on follow-up. None of the children with pineal cysts exhibited neurological signs.ConclusionBenign pineal cysts are a common finding in young children. High-resolution MRI demonstrates that these cysts are often septated. This pattern is a normal variant and does not require follow-up MR imaging or IV contrast media.


Journal De Radiologie | 2008

Imagerie par Résonance Magnétique fœtale : évaluation du vécu des patientes et implications pratiques

C. Adamsbaum; C. Garel; J.P. Legros

Fetal MR: evaluation of patient’s experiences and practical implications Purpose. Several studies have evaluated the experience of patients undergoing obstetrical US. No similar study evaluated the impact of fetal MR on patients. Our hypothesis was that the fetal MR is more anxiety-producing than fetal US. The goal was to acquire insight to improve the experience for patients. Patients and methods. Prospective dual-center study of 100 patients who answered a questionnaire validated by radiologists, obstetricians and psychologists. In one of the two centers, po sedation was routinely used in all patients. The questionnaires were qualitatively and quantitatively analyzed. Results. Results confirm the more stressful nature of MR compared to US (72%). One third of patients (34%) would have liked information about the procedure, diagnostic limitations, and mainly the impact on the fetus, especially with regards to noise. Most patients reported discomfort (duration, position) (82%) and stated that it would be preferable to be accompanied (83%). The perception of fetal movements by the mother was related to stress, noise and vibration of the MR examination. Conclusion. MR increases the anxciaty related to prenatal diagnosis by its setting and sometimes the lack of information, namely the fetal risk. It is important to maintain a dialogue between obstetricians and mothers from the indication to the acquisition of the MR. The diagnostic limitations of MR for prenatal diagnosis should be clearly stated. A discussion between the radiologist and mother after completion of the examination is desirable, if only to discuss the patient’s or couple’s comments.


Journal De Radiologie | 2009

Diffusion du cerveau fœtal normal : limites et espoirs

C. Cartry; V. Viallon; P. Hornoy; C. Adamsbaum

Objectifs Etudier la fiabilite et les variations de l’ADC (coefficient apparent de diffusion) sur une population de fœtus normaux. Materiels et methodes Etude prospective (2007-2008) incluant 22 IRM fœtales normales ou subnormales, effectuees entre 30 et 34 SA, selon le protocole habituel, sans sedation (3 plans T2, Tl, diffusion blOOO). Mesures de l’ADC par 3 regions d’interet juxtaposees dont une centrale, en SB frontale et occipitale sur l’hemisphere droit (6 ROIs). Tests statistiques : reproductibilite des 3 mesures juxtaposees (coefficient de correlation intra classe, CCI) et comparaison entre mesures frontales et occipitales (Wilcoxon). Resultats La valeur moyenne de l’ADC etait de 1,78 mm2/s en SB frontale (ecart-type 0,10) et de 1,66 mm2/s en SB occipitale (ecart-type 0,12), avec excellente reproductibilite intra observateur (CCI = 0,91 en frontal) et bonne reproductibilite des mesures juxtaposees (CCI = 0,7). Il existait une correlation lineaire negative entre ADC et âge gestationnel en occipital, et un gradient fronto-occipital de l’ADC significatif apres 32 SA. Conclusion La mesure de l’ADC est robuste et inversement corre-lee a l’âge gestationnel, en rapport avec la maturation cerebrale. L’existence d’un gradient fronto-occipital de l’ADC apres 32 SA est un marqueur de normalite qui devrait etre applicable au quotidien.


Journal De Radiologie | 2008

La détermination de l'âge osseux à des fins médico-légales, que faire ?

C. Adamsbaum; Katia Chaumoitre; Michel Panuel

a communauté médicale pédiatrique et radiologique du CHU de Rennes s’est mobilisée à propos de l’expertise médicale d’âge osseux d’un jeune étranger (Première page de Ouest-France le 20 mars 2008). Il parait effectivement important de rappeler à cette occasion, comme le Docteur Catherine Tréguier l’a fait, que l’utilisation à des fins médico-légales de l’âge osseux est très controversée et pose des problèmes d’ordre éthique graves. L’estimation de l’âge osseux n’est pas une science exacte. La détermination du degré de maturation osseuse définit « l’âge osseux ». Celui-ci ne représente qu’un élément du développement d’un enfant ou d’un adolescent qu’il est nécessaire d’intégrer dans un contexte clinique complet. Malgré de nombreuses études sur le sujet, les méthodes d’évaluation de l’âge osseux qualitatives, quantitatives ou chronologiques ont très peu évolué depuis une soixantaine d’années. La méthode de Greulich et Pyle reste la plus utilisée ; il s’agit d’une méthode qualitative d’évaluation de l’âge osseux effectuée sur une radiographie de face de la main et du poignet gauches, comparée à l’atlas de référence de Greulich et Pyle (radiographies de la main et du poignet gauches de sujets témoins pour chaque classe d’âge et pour les deux sexes). L’évaluation tient compte de l’existence et de la morphologie des épiphyses des métacarpiens, des phalanges et des os du carpe, mais la priorité est toujours donnée aux doigts pour l’appréciation de la maturation osseuse. Cette méthode qualitative a un taux de reproductibilité inter et intra observateur acceptable en pratique quotidienne, lorsque les observateurs sont entraînés à une telle lecture, notamment en radiopédiatrie (1-3). Il n’est cependant pas possible d’estimer l’âge osseux avec une précision inférieure à un an et, en pratique médicale, le profil évolutif de l’âge osseux chez un enfant donné est beaucoup plus important que l’estimation de la valeur absolue de l’âge osseux à un moment précis. L’appréciation de l’âge osseux est particulièrement difficile entre 16 et 18 ans, âge auquel la question est posée dans un cadre médico-légal, en raison des dispositions concernant les mineurs en France (absence de mesure d’expulsion à l’encontre des étrangers mineurs). L’utilisation de la méthode de Greulich et Pyle dans un cadre médico-légal doit tenir compte de la variabilité individuelle. Cette variabilité est aussi fonction des tranches d’âge (4). Cette notion est d’autant plus importante que l’atlas de Greulich et Pyle a été conçu entre 1931 et 1942 sur une population nord américaine. La méthode reste cependant adaptée aux populations européennes (5-7). Sa validité a été récemment vérifiée à travers l’étude d’une cohorte de plus de 1300 enfants du sud de la France (4). En revanche, la variabilité en fonction de l’origine géographique et des conditions socio-nutritionnelles est mal connue : une étude récente signale une meilleure corrélation entre l’âge osseux et l’âge civil dans les populations française et québécoise que dans un échantillon marocain (8). Deux publications récentes concernent l’Afrique sub-saharienne et mettent en évidence une inadéquation avec les standards occidentaux et un retard global de maturation (9, 10). Une méta-analyse de Schmeling en 2000 insiste sur l’influence du niveau socio-économique plus que celle de l’ethnicité (11). Cependant, aucun travail sur les modifications de dynamique de maturation n’a été réalisé sur les populations transplantées. La méthode de Greulich et Pyle est une méthode qualitative, sujette à une subjectivité de lecture. Celle-ci peut se réduire en faisant appel à des lecteurs entraînés au quotidien, et en pratiquant une double lecture indépendante. Bien qu’imparfaite, la méthode de Greulich et Pyle reste donc actuellement la méthode de référence pour estimer l’âge osseux quelle que soit l’origine géographique de la population (12). Devant une réquisition pour déterminer l’âge osseux à des fins médico-légales, il est de notre devoir d’appliquer les recommandations du Comité Consultatif National d’Ethique (13) et de rendre un résultat mentionnant la variabilité individuelle qui n’est jamais inférieure à plus ou moins un an (14). Il paraît important de relayer largement cette information auprès des institutions judiciaires.


Journal De Radiologie | 2006

IRM de diffusion de l'encéphale : aspect normal, images pièges et artefacts

A. Bertrand; Catherine Oppenheim; H. Moulahi; O. Naggara; S. Rodrigo; S. Patsoura; C. Adamsbaum; S. Pierrefitte; Jean-François Meder

Owing to its rapid acquisition time and high sensitivity, diffusion-weighted imaging has turned into a routine sequence for brain imaging. This is the case not only for stroke, but also for various diseases such as abscesses or tumors. Being aware of the artifacts is important for optimal interpretation. After a brief review of the normal patterns, the most frequent artifacts, inherent to the echoplanar imaging technique, are described and we provide suggestions to avoid them. Most current traps are caused by T2-weighting of the diffusion images; the key for avoiding erroneous interpretation relies on the ADC map.


Archives De Pediatrie | 2012

Le syndrome du bébé secoué : quelles lésions en imagerie ?☆☆☆

C. Adamsbaum; Béatrice Husson

Non-accidental brain trauma (also called shaken baby syndrome) represent the main cause for morbidity and mortality in the context of child abuse. It often occur in young infants aged less than 8months. The shaking leading to brain injuries are very violent and sometimes associated with a final impact. Intracranial injuries may be isolated without skeletal trauma or bruising. In any suspicion of such a diagnosis, emergency hospitalization is indicated. Brain CT, easy to perform in emergency, is the diagnostic key. It discloses diffuse subdural hematomas in typical sites as vertex, interhemispheric space and tentorium. There is no clear background of trauma and the related story is changing over time. The 3D analysis of the skull looks for signs of recent impact as a fracture that is sometimes complex and/or a soft tissue swelling of the scalp. Intraparenchymal injuries (contusions, tearing, and overall anoxic ischemic injuries) are better analyzed with MRI. The prognosis depends on their extent. Ophtalmologic examination is systematically performed looking for retinal hemorrhages (around one third of cases) which may be very subtle. Bruising is a major diagnostic sign, but inconstantly present. A precise datation of skeletal and/or brain injuries is not possible with imaging and the only indication of use is to establish the presence of age different lesions. This indicates repeated trauma and thereby a high risk of recurrence.


Archives De Pediatrie | 2009

Une masse pariétale lombaire chez un enfant

W. Douira-Khomsi; E. Mascard; C. Adamsbaum

0929-693X/

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Michel Panuel

Aix-Marseille University

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L. Mezzetta

Paris Descartes University

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Valérie Merzoug

Necker-Enfants Malades Hospital

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Katia Chaumoitre

Centre national de la recherche scientifique

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André Kahan

Paris Descartes University

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Julien Wipff

Paris Descartes University

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A. Bertrand

Paris Descartes University

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