Une tumeur neuroectodermique primitive périphérique à localisation gastrique primaire: &#192 propos d’un nouveau cas

Les tumeurs neuro-ectodermiques primitives ou sarcome d’Ewing sont classiquement des néoplasmes se développant aux dépends des tissus mous et des os. Les tumeurs neuro-ectodermiques primitives gastriques (pPNETs) sont extrêmement rares. Nous nous proposons, à travers le cas d’un patient, opéré pour une tumeur gastrique, d’étudier les aspects cliniques, radiologiques, anatomopathologiques et thérapeutiques des tumeurs neuro-ectodermiques primitives périphériques. A notre connaissance ce patient illustre le troisième cas de tumeur gastrique d’origine neuroectodermique décrite chez l’adulte

Traumatisme isolé du pancréas : à propos de 5 cas

The pancreatic trauma is rare. It represents 0.2 to 3 % of all abdominal injuries. The clinical symptomatology is not specific. The CT scan associated with magnetic resonance pancreatography allows making the diagnosis of the pancreatic lesion and the main pancreatic duct injury. Medical treatment can be sufficient, but essentially surgical and endoscopic treatments are required when there is duct involvement

Combined effect of mineralogy and granular texture on the technico-economic optimum of the adobe and compressed earth blocks

The objective of this paper is to quantify the combined effect of the mineralogy and the grain size on the cement optimum, offering the best resistance in the stabilization process of the earth material. The experimental results of chemical-mineralogical analysis and uniaxial compression tests on cylindrical samples of compressed earth blocks and adobe bricks of three types of earth material, associated with three contents of cement, are presented. The aim is to analyze and quantify the mutual influence of the granular texture and mineralogical components of the clay on the technico-economic optimum (TEO) of cement. The first result shows the commonly known statement that the compressive strength increases with the cement content. However, this paper shows that this increase varies with the granular components of the earth and the mineralogical constituents. The results also show that the presence of quicklime (with the presence of water) in the clay fraction produced calcium hydroxide, allowing the clay to be stabilized by the carbonation of the latter through the absorption of carbon dioxide from the air. Thus, the added hydrated cement matrix stabilizes the sandy-gravelly skeleton of the earth in order to strengthen ties between the grains. Furthermore, a higher percentage of SiO2 accelerates the reactions of cement hydration, which results in a higher strength of the material. As a consequence, the technico-economic optimum of cement is low unless the quantities of gravel and sand are important in the material

Kyste hydatique du sein à développement endothoracique: à propos d’un cas

Echinococcal involvement of the breast is extremely rare and usually not included in the differential diagnosis of breast lumps. This is an unreported case of a 23-year-old woman who came for mastalgia of the right breast. The diagnosis was performed by an ultrasound exam in conjunction with MRI before surgery. A complete excision of the breast cyst either the thoracic location was performed with success. Hydatid cyst of the breast is rare. The diagnosis by fine needle aspiration is controversial. The treatment is based on complete excision of the cyst

Durability of the earth mortar: Physico-chemical and mineralogical characterization for the reduction of the capillary rise

The stabilization of the earth material in the fields related to the earthen construction, in compliance with the standards in force, allows strong results of strength and durability. The chemical and mineralogical elements play an important role, in the presence of an 'optimum' cement dosage, to strengthen the ties between the clays and the grains of the earth.. This approach targets the search for better performances in the use of natural materials resource in an eco-responsible habitat. This study presents the experimental results of the four techniques of mineralogical and chemical analysis on mortar specimens obtained from earth of the city of Fez. The results of the uni-axial compressive tests of the cylindrical specimens for this earth, associated by various percentages 0%, 4%, 7% and 10% by weight of cement, make it possible to analyze the effect of the mineralogical and chemical elements on the mechanical properties, namely Young's modulus, compressive strength and limiting deformation. However, we determine the water absorption coefficient of the mortar for different cement dosages in order to optimize the durability of the mortar against bad weather, rain and / or very wet climates. In the earth mortar of Fez, the strong presence of calcite (CaCO3), quartz SiO2 and dolomite CaMg (CO3)2 amplifies the improvement of the behavior of the material by the addition of cement. In fact, this strong presence of calcite stabilized the clay by cementing quartz and the cement matrix to strengthen the ties between the grains of the earth. In addition, with respect to the capillary rise, the water absorption decreases with the addition of cement. We also note that the evolution of the mechanical properties is of no importance except in the interval [4 to 7%] which represents the zone of effect for cement stabilization and which houses the optimum technicoeconomic cement dosing

Durability of the earth mortar: Physico-chemical and mineralogical characterization for the reduction of the capillary rise

The stabilization of the earth material in the fields related to the earthen construction, in compliance with the standards in force, allows strong results of strength and durability. The chemical and mineralogical elements play an important role, in the presence of an 'optimum' cement dosage, to strengthen the ties between the clays and the grains of the earth.. This approach targets the search for better performances in the use of natural materials resource in an eco-responsible habitat. This study presents the experimental results of the four techniques of mineralogical and chemical analysis on mortar specimens obtained from earth of the city of Fez. The results of the uni-axial compressive tests of the cylindrical specimens for this earth, associated by various percentages 0%, 4%, 7% and 10% by weight of cement, make it possible to analyze the effect of the mineralogical and chemical elements on the mechanical properties, namely Young's modulus, compressive strength and limiting deformation. However, we determine the water absorption coefficient of the mortar for different cement dosages in order to optimize the durability of the mortar against bad weather, rain and / or very wet climates. In the earth mortar of Fez, the strong presence of calcite (CaCO3), quartz SiO2 and dolomite CaMg (CO3)2 amplifies the improvement of the behavior of the material by the addition of cement. In fact, this strong presence of calcite stabilized the clay by cementing quartz and the cement matrix to strengthen the ties between the grains of the earth. In addition, with respect to the capillary rise, the water absorption decreases with the addition of cement. We also note that the evolution of the mechanical properties is of no importance except in the interval [4 to 7%] which represents the zone of effect for cement stabilization and which houses the optimum technicoeconomic cement dosing