Lymphome primitif du sein: à propos d’un cas

Le lymphome primitif du sein est une entité histologique très rare du cancer du sein. Les aspects cliniques et radiologiques ne présentent pas de spécificités particulières. Le diagnostic est souvent retardé. Le traitement se base essentiellement sur la chimiothérapie. Le pronostic est globalement péjoratif. Nous rapportons un cas de lymphome malin non Hodgkinien primitif du sein chez une patiente de 38 ans. Parallèlement une revue de la littérature est entreprise évoquant les aspects épidémiologiques, cliniques, histologiques et thérapeutiques de ce néoplasme. Pan African Medical Journal 2012; 12:5

Situation de la pêche aux petits métiers après l'ouverture du nouveau chenal dans la lagune de Nador

Artisanal fishing is the main socioeconomic activity in Nador lagoon, located on the Mediterranean coast in the North East of Morocco. This activity is not part of the official circuit. In 2009, after the deterioration of water quality, public authorities have decided to open an artificial channel with the aim of improving the circulation of water in the lagoon. This work aims to be an update of the state of knowledge of artisanal fishing in the Nador lagoon, after the opening of the new channel, through a diagnosis based on the exploitation and analysis of socioeconomic indicators. The analysis shows that fishermen operate with six jobs. The annual fishing effort is estimated at 72,385 fishing trips. The overall catch is estimated at 1,157 tons annually for a raw product of 28,180,146 MAD. The economic analysis shows that invested capital is 20,723,000 MAD. For a number of 15.4 fishing trips per month, the monthly net profit per boat is 2,465 MAD. The added value produced by all boats is about 6.3 million MAD. Keywords: Nador Lagoon, Diagnosis, Socioeconomic indicators, Artisanal fishing.La pêche artisanale constitue la principale activité socio-économique au niveau de la lagune de Nador. C’est une activité qui sort du circuit officiel. En 2009, suite à la détérioration de la qualité de l’eau, les pouvoirs publics ont décidé l’ouverture d’un chenal artificiel, dans l’objectif de l’amélioration de la circulation de l’eau au niveau de la lagune. Le présent travail propose une actualisation de l’état des connaissances de l’activité de pêche artisanale dans la lagune de Nador, après l’ouverture du nouveau chenal, à travers un diagnostic basé sur l’exploitation et l’analyse d’indicateurs socio-économiques. L’analyse montre que les pêcheurs pratiquent six métiers. L’effort de pêche annuel est estimé à 72.385 sorties. Le volume des captures est estimé à 1.157 tonnes pour un produit brut de 28.180.146 MAD. L’analyse économique montre que le capital investi est de 20.723.000 MAD. Pour un nombre de sorties de pêche de 15,4 /mois, le profit net mensuel par barque est de 2.465 MAD. La valeur ajoutée produite par l’ensemble des unités est d’environ 6,3 millions MAD. Mots clés : Lagune de Nador, Diagnostic, Indicateurs socioéconomiques, Pêche artisanal

Matching fingerprint images for biometric authentication using convolutional neural networks

The use of biometric features, to authenticate users of different applications, is growing rapidly in recent years, according to the high sensitivity of the protected information and the good security that biometric authentication provides. In this study, a method is proposed to measure the similarity between two fingerprint images, using convolutional neural networks, instead of classifying them. Thus, modifying the users that the proposed method can recognize is a matter of adding or removing model images of the users’ fingerprints. The similarity between the fingerprint image and every model image was measured in order to select the user with the highest similarity to the input image as the recognized user, where that similarity measure was compared to a threshold value in order to authenticate that user. The evaluation results of the proposed method, using FVC2002_DB1 and FVC2004_DB1 showed that the proposed method had 99.97% accuracy with 0.035% False Acceptance Rate (FAR) and 0% False Rejection Rate (FRR). Hence, the proposed method has been able to maintain high accuracy while eliminating the vulnerabilities of biometric authentication systems imposed by the use of separate stages for features extraction and similarity measurement

L’occlusion intestinale aigue gravidique - à propos de cinq cas

L’occlusion intestinale survient rarement au cours de la grossesse mais elle s’accompagne d’une morbidité et mortalité maternelle et fœtale élevées souvent dues au retard diagnostic et thérapeutique. Les auteurs rapportent cinq cas d’obstruction intestinale gravidique, et revoient la littérature afin de discuter les mécanismes physiopathologiques, les difficultés diagnostiques et thérapeutiques et de proposer une conduite à tenir adéquate

Mixed neuroendocrine-non-neuroendocrine neoplasms of the right colon: a case report

Mixed neuroendocrine-non neuroendocrine neoplasm (MiNENs) is a rare gastrointestinal neoplasm that has been redefined by the World Health Organization (WHO) in 2017 as the association of two types of components, neuroendocrine and non-neuroendocrine, each of them present in at least 30% of the tumour mass. Small case reports and case series have demonstrated the occurrence of this neoplasm in the colon. We here report the case of a 47-year-old man undergoing colonscopy for anemia. This showed impassable polypoidal tumor budding in the right colic flexure. Computerized tomography (CT) scan and magnetic resonance imaging (MRI) showed the presence of liver metastases. As the tumor was hemorrhagic, right hemicolectomy with lymph node dissection was performed. The histological examination showed MiNEN of the ascending colon. The patient received adjuvant chemotherapy

Giant splenic cysts discovered incidentally after early abortion

Splenic cysts are rare tumors, grouped into parasitic and non-parasitic cysts, no-parasitic cysts are further classified into primary and secondary cysts depending on the mucous membrane of the cyst, radiological imaging allows the diagnosis to be made but confirmation of the diagnosis is based on an atom-o-pathological examination of the part. surgical treatment is the cornerstone of symptomatic and complicated splenic cysts. The conservative treatment is a reference for splenic cysts. We report the case of a young woman who was presented with a simple cyst of the spleen

Evolution Temporelle Et Spatiale De La Macroflore Benthique De L’ecosysteme Lagunaire De Nador

The objective of the present study undertaken in 2011is to evaluate the status of the benthic macroflora of the Nador lagoon after the management works carried out in 2009 to improve the lagoon environmental quality. Relying on a previous study carried out in 1987, the results of analysis in 2011 showed that the lagoon seabed macroflora recorded a marked decline and an overall change in its distribution and specific composition. The marine Phanerogams, represented by Cymodocea and Zostera, in association with Caulerpa, which were the main vegetationin 1987, were replaced by a macroflora highly dominated by macroalgae (64.3% of the total area), essentially represented by Rhodophyceae (58% of total area).In 2011, the genus Alsidiumwas the main representative in the macroflora(55% of total area),while the genus Caulerpa, and Phanerogamssaw their area of occurrence regress to 25.6% and 18% respectively

Preliminary Analysis for Identification of Priority Species of Small Pelagic Shared Stocks in GSA01 And GSA03 (Alborán Sea)

Small pelagic resources and particularly sardine (Sardina pilchardus) and anchovy (Engraulis encrasicholus) represent an important fishery activity for the countries bordering the Alboran Sea. This paper aims at contributing to the identification of priority species of small pelagic shared stocks in GSA01 and GSA03 (northern and southern Alboran Sea GFCM regions) for carrying out joint stock assessments and promoting new management measures that would allow the sustainability of the resources and its exploitation. The WG on small pelagic shared stocks met twice during 2011 progressing in analysing the available data on the stocks and its exploitation and building a common data base. Moreover a comparative analysis on sardine landings data from 2003-2010 in GSA01 and GSA03 was carried out explaining that the exploitation pattern in sub-areas (GSAs 01 and 03) is different but the total length-frequency distribution of sardine exploited by each country appears to be similar. A tentative in applying a LCA analysis of the Moroccan and Spanish data on sardine using different biological parameters and with the VIT software was unsuccessful but orientated for future works of the W

Characterization of the New Status of Nador Lagoon (Morocco) after the Implementation of the Management Plan

The present study was carried out in 2011 with the aims of (1) evaluating the changes in sedimentary distribution that occurred in Nador lagoon seabed (Morocco) after the implementation of the lagoon management plan in 2009; and (2) characterizing its new sedimentary status in 2011. Due to the lack of a baseline, we used the 1992 sedimentary status for comparison. The seabed surface sediment distribution showed a great change between 1992 and 2011. We found the same four sediment facies, which were present in 1992, namely: mud, sandy mud, muddy sand, and fine sand. However, in 2011, mud covered more than 54% of the lagoon seabed surface, mostly located in the middle part of the seabed, whereas in 1992, more than 80% of the lagoon seabed was covered by sandy mud. The sediments’ characteristics showed moderately to poorly sorted facies (S0), ranging between platykurtic and leptokurtic (SK) and with various symmetry indices (SG). The organic matter content in sediment has strongly decreased, from values higher than 20% in most areas in 1992 to a mean value of 3.9% in 2011, ranging from 0.2% to 10.4%, thus confirming that the management actions implemented in 2009 were likely effective in reducing the organic pollution

Modeling coherence effects on cavity-based spectroscopy

Optical cavities are powerful instruments with which to perform sensing experiments. Through spectroscopic techniques, the presence of a target biological analyte or chemical species can be inferred by detecting the changes they produce in the spectral properties of a cavity. Conventional cavity-based spectroscopy relies on very narrow linewidth laser sources in order to mitigate the effects of optical coherence on the measurements they yield. The growing demand for fully-integrated and miniaturized sensing platforms for purposes such as point-of-care testing, disaster management, and environmental monitoring places stringent constraints on the design of sensing instruments. As a result, the use of optical sources with larger linewidths is unavoidable for these applications. Given this context, the aim of this work is the derivation of closed-form analytic models of cavity-based sensing that quantify the impact of source bandwidth (i.e., coherence) on spectroscopic measurements. Three cavity-based sensing paradigms are investigated in detail: cavity-enhanced absorption spectroscopy (CEAS), cavity ring-down spectroscopy (CRDS), and phase-shift cavity ring-down spectroscopy (PS-CRDS). Furthermore, examples based on a microtoroidal cavity are presented for each paradigm, where predicted measurements obtained from systems using tunable laser (narrow linewidth) or laser diode (large bandwidth) sources are compared. The models developed in this work demonstrate that microtoroid systems employing tunable lasers can detect changes in cavity transmission coefficient and refractive index. Laser diodes also yield measurements that are comparably sensitive to changes in cavity transmission coefficient, but they are insensitive to the microtoroid's refractive index.Les cavités optiques sont des instruments exceptionnels pour les expériences de détection. À l'aide de techniques spectroscopiques, la présence d'une entité biologique ou d'une espèce chimique peut être déduite en mesurant les modifications qu'elles produisent sur le spectre d'une cavité. Conventionnellement, cette méthode est effectuée avec un laser dont la largeur spectrale très étroite minimise les effets de la cohérence optique sur les résultats obtenus. La demande croissante pour des systèmes de diagnostics miniaturisés dans les domaines de la santé et de l'environnement impose de fortes contraintes sur la conception de ces instruments. Il devient donc nécessaire d'utiliser des lasers à plus grande largeur spectrale pour ces applications. De ce fait, ce document élabore le développement de modèles mathématiques qui prédisent l'impact de la largeur spectrale d'une source lumineuse (c'est-à-dire la cohérence optique de celle-ci) sur les résultats de la spectroscopie à base de cavité. Trois techniques de détection sont investiguées en détail: «cavity-enhanced absorption spectroscopy» (CEAS), «cavity ring-down spectroscopy» (CRDS) et «phase-shift cavity ring-down spectroscopy» (PS-CRDS). De plus, des exemples basés sur un microtoroïde sont présentés pour chaque méthodologie afin de comparer la performance d'un laser accordable (largeur spectrale très étroite) et d'une diode laser conventionnelle (largeur spectrale très large). Les modèles démontrent qu'un instrument à base de microtoroïde qui utilise un laser accordable peut détecter des changements du coefficient de transmission et de l'indice de réfraction de la cavité. Les diodes lasers donnent des résultats comparables pour le coefficient de transmission, mais ne détectent pas des changements de l'indice de réfraction