Short-term variability in Greenland Ice Sheet motion forced by time-varying meltwater inputs: implications for the relationship between subglacial drainage system behavior and ice velocity.

High resolution measurements of ice motion along a -120 km transect in a land-terminating section of the GrIS reveal short-term velocity variations (<1 day), which are forced by rapid variations in meltwater input to the subglacial drainage system from the ice sheet surface. The seasonal changes in ice velocity at low elevations (<1000 m) are dominated by events lasting from 1 day to 1 week, although daily cycles are largely absent at higher elevations, reflecting different patterns of meltwater input. Using a simple model of subglacial conduit behavior we show that the seasonal record of ice velocity can be understood in terms of a time-varying water input to a channelized subglacial drainage system. Our investigation substantiates arguments that variability in the duration and rate, rather than absolute volume, of meltwater delivery to the subglacial drainage system are important controls on seasonal patterns of subglacial water pressure, and therefore ice velocity. We suggest that interpretations of hydro-dynamic behavior in land-terminating sections of the GrIS margin which rely on steady state drainage theories are unsuitable for making predictions about the effect of increased summer ablation on future rates of ice motion. © 2012. American Geophysical Union

The incidence and pattern of geriatric limb fractures in Ibadan, Nigeria

Background: Individuals within the geriatric age group sustained different types of fractures as such the need to determine the incidence and pattern of limb fractures among patients 65 years and above admitted through the accident and emergency department of the University College Hospital Ibadan.Methods: A retrospective hospital-based study in which patients 65 years and above admitted through the accident and emergency department of the University College Hospital Ibadan over a 42-month period were involved in the study. Using a proformal completed from the electronically stored data that captures the patient’s history, examination findings, X-ray film and treatment offered which was collected on a weekly basis.Results: 12.58% of the patients reviewed within the study period were geriatric patients. A total of 98 geriatric patients were reviewed. There were 59 female and 39 male with a ratio 1.5:1. The fractures were mostly secondary to a trivial fall within their homes (68.37%) while traumatic injury from motor vehicle and motor bike crashes accounted for 11.22% and 16.33% respectively. The most commonly fractured bone is the femur and the proximal third is the most affected part. Comminuted fracture is the most common pattern observed.Conclusions: More than 10% of the reviewed population was in the geriatric age group and the proximal femur was the most commonly fractured bone in this age group. They usually follow trivial falls

A rare case of urinary tract infection due to Trichosporonasahii in a diabetic patient

Trichosporonasahii is a basidiomycete yeast responsible for white piedra and onychomycosis in the immunocompetent host. In the immunocompromised patients, invasive infections are reported; their diagnosis is difficult and they are associated with high mortality rate. Urinary infection due to Trichosporon Asahi is rare but its incidenceis increasing. We report the case of a 58 year old diabetic patient. The yeast was isolated from urine samples of three  consecutive crops in pure form. The patient improved after antifungal therapy

Migration Intravésicale du Dispositif Intra-Utérin à Propos de Cinq Cas

La migration intravésicale du dispositif intra-utérin (DIU) par perforation utérine est une complication rare. Dans cette étude rétrospective monocentrique, nous présentons notre expérience de 5 cas colligés au sein de notre établissement entre 2004 et 2009. L’âge moyen de nos patientes est de 39 ans (32-48 ans). La symptomatologie clinique révélatrice était dominée par le syndrome irritatif vésical. Le diagnostic a été évoqué sur le couple écho/AUSP, puis confirmé par la cystoscopie. Le traitement a consisté en une lithotritie balistique du calcul avec extraction du stérilet par voie endoscopique chez 4 patientes et extraction chirurgicale chez une seule.Mots clés : Calcul vésical, dispositif intra-utérin, lithotritie balistique, migration

Renal oncocytoma: experience of Clinical Urology A, Urology Department, CHU Ibn Sina, Rabat, Morocco and literature review

Renal oncocytoma is a rare and benign renal tumor. Only few cases have been reported in Moroccan populations. In the present study, we reportour experiences in the diagnosis, management and follow-up of this disease. We report on six cases of renal oncocytoma indentified between 1990 and 2008 in the urology department of “CHU Ibn Sina” in Rabat. These six cases are listed among 130 kidney tumors reported during the study period. We assess the clinical, radiological and therapeutic features of the patients and we review literature. Six cases of renal oncocytoma,representing 4.6% of all primitive kidney tumors treated in our institution during the study period. The mean age was 53 ±9.7 years (range 34 to61 years). One patient was asymptomatic at presentation, five patients (83%) had flank pain and two (33%) had macroscopic hematuria. Thetumor was right sided in 4 cases (66%) and left sided in 2 cases (33%). All patients underwent CT scan which showed, in three cases, a centrallylocated stellate area of low attenuation. The clinical suspicion of  oncocytoma was made preoperatively in only 3 patients by imaging studies, but the suspicion of renal cell carcinoma persist and all patients were treated with radical nephrectomy. Definitive diagnosis was made in all cases postoperatively. All the tumors were well circumscribed but unencapsulated. The mean tumor size was 8,75±2,04 cm. Four patients were classified at stage pT2 and two at stage p T1. Most of the pathological features in our patients were typical of this entity.  Predominant cell type was a typical oncocytoma with general low mitotic activity. No extension to peri-nephric fat tissue or lymphovascular invasion was observed. After a mean follow-up of 36 months (range 26-62 months), there was neither recurrence nor death from oncocytoma. Accordingly, the disease-specific survival was 100%. Renal oncocytoma has a benign clinical course with excellent long-term outcomes. In our series, it happened mostly in females and is more frequently symptomatic. Although radical nephrectomy is the usual treatment, a conservative approach should be considered whenever there are signs of clinical and radiological presumptions.Key words: Renal oncocytoma, tumor, diagnosis, treatmen

Nutrient Composition and Weight Evaluation of some Newly Developed Maize Varieties in Nigeria.

The weight and chemical composition of improved white and improved yellow dent maize was compared with some local floury maize varieties. The average protein content was 10.8%, 11.1% and 10.5% in improved white dent, improved yellow dent and local floury respectively. The major carbohydrate in all the varieties was starch with local floury having a slightly higher level of sugar. Improved yellow dent was significantly (P 0.05) change in the average weight of all varieties. The average weight ranged between 28.2 in improved white dent to 29.8 in improved yellow dent. The yellow dent variety will be particularly useful in improving level of micronutrient intake

Séminome Spermatocytaire: à Propos d’un Cas et Revue de La Littérature Spermatocytic Seminoma

Le séminome spermatocytaire est une tumeur rare, représentant moins de 2% des cancers du testicule, survenant essentiellement chez le sujet âgé. Nous rapportons une nouvelle observation d’un patient âgé de 48 ans. La tumeur se présentait comme une prolifération de cellules en nappescompactes, avec 3 types cellulaires, des cellules de petite taille, des cellules intermédiaires et des grandes cellules. Il n’a été retrouvé ni contingent sarcomateux, ni séminome classique. L’analyse en immun histochimie n’a retrouvé aucune expression des cellules tumorales pour les anticorpsclassiques testés, notamment l’Ac anti PLAP et les marqueurs lymphoïdes. Le séminome spermatocytaire doit être reconnu, car son évolution est très favorable et ne nécessite qu’une simple orchidectomie, en l’absence d’un exceptionnel contingent sarcomateux ou de métastase où une chimiothérapie s’impose

CARCINOME VESICAL ET TUMEUR DE BRENNER DE L’OVAIRE: ORIGINES ETIOPATHOGENIQUES ET IMMUNOHISTOCHIMIQUES COMMUNES

Brenner’s tumor is a rare ovarian tumor that is diagnosed by anatomopathology. It’s relation with a bladder’s transitional cell carcinoma have suggested many etiopathogenic and immunohistochemical hypothesis. New insights highlights embryologic and immunoprofile common origins. The morphological similarity between the islands and Walthard Brenner tumor (presence of a bladder urothelium) suggest that this tumor may be a transitional cell metaplasia of the coelomic epitheliuma.La tumeur de Brenner est une tumeur rare de l’ovaire dont le diagnostic est anatomopathologique. Ses liens avec le carcinome urothélial de vessie soulève de nombreuses hypothèses d’ordre étiopathogénique et histogénétique. De nouvelles pistes de recherches mettent en exergue des origines embryologiques et immunohistologiques communes. La ressemblance morphologique entre les îlots de Walthard et la tumeur de Brenner (présence d’un urothélium vésical) font penser que cette tumeur pourrait constituer une métaplasie cellulaire transitionnelle de l’épithélium coelomique

HEMATOME SPONTANE SOUS CAPSULAIRE DU REIN

Spontaneous subcapsular haematoma of the kidney is a rare clinical condition, secondary to kidney tumors in more than 50% of cases. Diagnosis is suggested by sonography and confirmed by CT-scan. Renal angiography, performed in haemodynamically stable patients, shows the origin of bleeding and allows embolisation. The nephrectomy is indicated in front of a kidney tumor or non controlled bleeding.L’hématome spontané sous capsulaire du rein est une entité clinique rare. Les étiologies sont dominées par les tumeurs du rein dans plus de 50% des cas. Son diagnostic est suspecté à l’échographie et confirmé par la tomodensitométrie. Chez les patients avec état hémodynamique stable, l’artériographie localise l’origine du saignement et permet l’embolisation thérapeutique. La néphrectomie est justifiée en présence d’une tumeur ou en cas d’hémorragie non contrôlée