Fracture-décollement de l’épiphyse médiale de la clavicule: à propos de 6 cas et revue de la littérature

Le but de ce travail est de décrire les caractéristiques épidémiologiques et les différentes entités anatomo-cliniques de la fracture-séparation del’épiphyse claviculaire médiale mais également de rapporter les résultats morphologiques et fonctionnelsde de la réduction sanglante suivie del’ostéo-suture au fil non résorbable. Cinq garçons et 1 fille âgés en moyenne de 14 ans ont présenté un traumatisme fermé et isolé de la ceinturescapulaire. L’examen clinique et l’imagerie médicale surtout la TDM ont permis de poser le diagnostic de décollement épiphysaire, de classer ledegré d’ossification de l’épiphyse claviculaire médiale en précisant le sens du déplacement, ainsi que la nature du décollement selon Salter-Harris.Une réduction sanglante suivie d’une ostéo-suture au fil non résorbable décimale n°1 a été réalisées chez 3 patients. Un patient a bénéficié d’unembrochage croisé. Les deux plus jeunes ont été traités orthopédiquement. Le déplacement du moignon claviculaire était antérieur chez 3 patientset rétro-sternal chez les 3 autres. Les formes postérieures ont été compliquées d’une odynophagie (n=2) et d’une compression asymptomatique dela veine sous Clavière (n=1). L’une des formes postérieuresétait associée a une fracture ipsilatérale du 1 / 3 médial de la clavicule. La consolidationa été obtenue chez tous les malades avec une mobilité de l’épaule conservée. La fracture-décollement de l’extrémité médiale de la clavicule mimeau plan clinico-radiologique la luxation sterno-claviculaire. Elle peut être grave en raison du risque de compression viscérale et vasculaire dans saforme postérieure. La tomodensitométrie reste irremplaçable pour un diagnostic précis. Notre préférence va à la réduction sanglante suivie d’uneostéo-suture au fil non métallique. This study aims to describe the epidemiological characteristics and the different anatomo-clinical entities of the fracture-separation of the medialclavicular epiphysis but also to relate the morphological and functional results of bloody reduction followed by osteosuture using non absorbablethread. Five boys and one girl (mean age 14 years) showed a closed and isolated shoulder girdle trauma. Clinical examination and medicalimaging, especially CT scan, allowed the diagnosis of epiphyseal separation and to classify the degree of medial clavicular epiphysiseal ossificationindicating the direction of displacement as well as the nature of displacement according to the Salter-Harris classification. Bloody reductionfollowed by osteosuture using non absorbable thread (No. 1 decimal) was performed in 3 patients. One patient underwent cross-pinning the twoyounger patients were treated orthopedically. The displacement of the clavicle stump was anterior in 3 patients and retro-sternal in 3 patients.Posterior forms were complicated by odynophagia (n = 2) and asymptomatic compression of the subclavian vein (n = 1). One of the posteriorforms was associated with an ipsilateral fracture of the medial one third of the clavicle. Consolidation was achieved in all patients with preservationof shoulder mobility. The fracture-separation of the medial end of the clavicle mimes clinically and radiologically the sternoclavicular dislocation. Itcan be serious because of the risk of visceral and vascular compression in its posterior form. Tomdensitometry is irreplaceable for an accuratediagnosis. Our preference is for bloody reduction followed by osteosuture using non metallic thread

Reproduction patterns of the bloody cockle Senilia senilis (Linnaeus 1758) in the Sine-Saloum inverse estuary

Understanding the reproductive biology of a species is an important means of determining the renewal capacity of natural stocks, especially in the case of heavily exploited species. It is a fundamental element in supporting the implementation of management measures. Here, we studied the bloody cockle (S. senilis) in the Sine-Saloum, with the aim of describing its seasonal and spatial reproductive cycle. S. senilis reproduction was studied over an annual cycle at two sites chosen for their contrasting situations along the upstream-downstream gradient. The reproductive cycle was studied by histological analysis of a pool of individuals maintained in-situ and sampled throughout the year. Our results showed that gamete maturation is asynchronous within and between individuals. Gametogenesis mostly occurred in October. The maturation stage showed a seasonal pattern with continuous reproduction throughout the year, with two preferred periods between May and July and December and February. The reproductive cycle is highly dependent on temperature and salinity variations, resulting in a seasonal cycle and spatial heterogeneity. The temperature induces gametogenesis and salinity synchronizes the spawning periods

Gonad histological analysis of Senilia senilis sampled in the Sine Saloum inverse estuary in Senegal between march 2021 and march 2022

Understanding the reproductive biology of a species is an important means of determining the renewal capacity of natural stocks, especially in the case of heavily exploited species. It is a fundamental element in supporting the implementation of management measures.Here, we studied the bloody cockle (S. senilis) in the Sine-Saloum, with the aim of describing its seasonal and spatial reproductive cycle. S. senilis reproduction was studied over an annual cycle at two sites chosen for their contrasting situations along the upstream-downstream gradient.The dataset contains the results of biometric measurements (individual height and weight) and gonad histological analyses (maturation stage, reproductive investment) of a pool of bloody cockles (Senilia Senilis; n = 200) individuals maintained in-situ in an experimental caging and sampled throughout the year in the Sine Saloum inverse estuary (Senegal), between March 2021 and March 2022. The reproduction being asynchronous, each stage of maturation for a given individual is represented by its percentage ratio to the total surface area of the gonad. The reproductive investment represents the surface area occupied by the gonad, all stages combined, over the total surface area of the body section.Understanding the reproductive biology of a species is an important means of determining the renewal capacity of natural stocks, especially in the case of heavily exploited species. It is a fundamental element in supporting the implementation of management measures. Here, we studied the bloody cockle (S. senilis) in the Sine-Saloum, with the aim of describing its seasonal and spatial reproductive cycle. S. senilis reproduction was studied over an annual cycle at two sites chosen for their contrasting situations along the upstream-downstream gradient. The dataset contains the results of biometric measurements (individual height and weight) and gonad histological analyses (maturation stage, reproductive investment) of a pool of bloody cockles (Senilia Senilis; n = 200) individuals maintained in-situ in an experimental caging and sampled throughout the year in the Sine Saloum inverse estuary (Senegal), between March 2021 and March 2022. The reproduction being asynchronous, each stage of maturation for a given individual is represented by its percentage ratio to the total surface area of the gonad. The reproductive investment represents the surface area occupied by the gonad, all stages combined, over the total surface area of the body section