Aspects épidémiologiques des enfants diabétiques perdus de vue à Abidjan / Epidemiological aspects of children with diabetes lost to follow-up at Abidjan

Introduction. Ces vingt dernières années, on assiste à une augmentation spectaculaire du nombre de cas de diabète de type 1 avec une mortalité plus élevée en Afrique Noire en lien avec les difficultés d'accès aux soins, à la rupture de suivi engendrant un nombre élevé de perdus de vue. L'objectif du travail est de déterminer le profil épidémiologique des enfants diabétiques perdus de vue dans notre pratique. Patients et méthodes. C'est une étude transversale à visée descriptive et analytique qui a concerné les enfants diabétiques perdus de vue de 2002 à 2019 dans le service de diabétologie du CHU de Yopougon. Résultats. Durant l'étude 195 enfants ont été suivi dans le service, 90 ont été considérés comme perdus de vue soit une fréquence de 46,15 %. L'âge moyen des perdus de vue était de 14,6 ± 5,3 avec des extrêmes allant de 2 à 20 ans. Ils sont majoritairement de sexe F dans 50,6 %. Dans 37 % on retrouve un niveau socio-économique faible calculé selon l'indice IPSE avec une association statistiquement significative entre les classes socio-économiques moyenneinferieure et moyenne (p respectivement < 0,01 et 0,001). La plupart des perdus (84,5 %) n'ont pas d'assurance maladie. Le lieu de résidence était urbain (Abidjan) dans 73 %. Ils ont issus d'une famille biparentale dans 79 ,8 % des cas. Une association statistiquement significative a été retrouvée entre la non-scolarisation et la perte de vue (P < 0,05).Conclusion. Le manque de suivi chez les enfants diabétiques a des conséquences drastiques sur le pronostic de la maladie au long cours, marqué par une mortalité de 11 % qui touche essentiellement les populations à revenu faible

Introduction. Over the past twenty years, there has been a spectacular increase in the number of cases of type 1 diabetes with a higher mortality rate in Black Africa due to difficulties in accessing care but also a lack of follow-up resulting in a high number of people being lost to follow-up. Our work aims to determine the epidemiological profile of diabetic children lost to follow-up. Patients and methods. This was a cross-sectional study with descriptive and analytical aims which concerned diabetic children lost to follow-up from 2002 to 2019 in the diabetes department of the University Hospital of Yopougon. Results. During the study period, 195 children were followed up in the department, 90 were considered as lost to follow-up, i.e. a frequency of 46.15%. The average age of the lost to follow-up was 14.6 ± 5.3 years with extremes ranging from 2 to 20 years. The majority of them were male (50.6%). Thirty-seven percent had a low socioeconomic level calculated according to the IPSE index, with a statistically significant association between the lowermiddle and middle socioeconomic classes (p < 0.01 and 0.001 respectively). Most of the lost (84.5%) did not have health insurance. The place of residence was urban (Abidjan) in 73%. They came from a two-parent family in 79.8% of cases. A statistically significant association was found between non-education and loss of sight (P < 0.05). Conclusion. The lack of follow-up in diabetic children has drastic consequences on the prognosis of the disease in the long term marked by a mortality of 11% which affects mainly low-income populations.

Complex fractures of the acetabulum: Should the enlarged iliofemoral approach be abandoned? Results at 20 years' follow-up.

INTRODUCTION: Among the various options for internal fixation of acetabular fractures, the enlarged iliofemoral approach is less often used, being more invasive, although providing greater exposure enabling control of all components in complex fractures. Even so, the impact of its invasiveness has not been confirmed, and long-term results are not known. We therefore performed a retrospective study, aiming: to assess long-term functional outcome, and; to assess associated morbidity. HYPOTHESIS: The enlarged iliofemoral approach allows precise reduction, with favorable long-term outcome. MATERIAL AND METHODS: Between 1992 and 1997, 15 patients were operated on for complex acetabular fracture by a single surgeon using an enlarged iliofemoral approach. Two patients were excluded due to lack of follow-up data, leaving 13 patients for analysis: 3 simple transverse fractures, 4 transverse+posterior wall fractures, 4 anterior column+posterior hemi-transverse fractures, one T-shaped fracture and one 2-column fracture. There were 4 cases of posterior dislocation of the hip, and 8 of intrapelvic protrusion. Surgical morbidity was assessed in terms of operative time, number of packed red blood cell transfusions, iatrogenic lesions or postoperative complications, rehabilitation time, and hospital stay. Functional assessment at follow-up used the WOMAC index and Harris score; radiologic assessment used the Kellgren-Lawrence score for osteoarthritis and Brooker score for ossification. RESULTS: Reduction was in all cases anatomic. There were no intra- or post-operative complications. Median number of packed red blood cell transfusions was 5 [range, 3-10]. Median operative time was 4hours [3-6]. Median hospital stay was 6 weeks [6-8], to allow systematic traction with early postoperative mobilization. Weight-bearing was resumed at a median 8 weeks [8-12]. At a median 22 years' follow-up [20-24], median Harris score was 83.5 [63-92] and median WOMAC index 24.5 [1-52]. All patients showed Brooker 1 or 2 ectopic ossification and moderate osteoarthritis. Two underwent subsequent arthroplasty (at 1 and 11 years after the index procedure). DISCUSSION: The enlarged iliofemoral approach allowed anatomic reduction of acetabular fracture. It provided very good long-term results, without excessive morbidity. LEVEL OF EVIDENCE: IV, retrospective non-controlled study.

[Extensive lower clivus chordomas. Removal using the unilateral transmandibular approach]. / Chordomes extensifs du clivus inférieur. Exérèse par voie transmandibulaire unilatérale.

BACKGROUND AND PURPOSE: Clival chordomas are rare skull-base tumors with local malignant behavior. Their control and removal remain difficult because of their anatomical location and because of their extensions. The goal of the treatment is complete surgical removal in a single stage if possible, with minimal deficits, followed by proton therapy. If the tumor remains extradural for a while, it finally progresses through the dura backwards to reach and displace the brain stem and upper cervical cord. Its anterior extension in the retropharyngeal space offers a logical opportunity and many advantages to use an anterior approach. METHODS: With three consecutive cases, we try to demonstrate that the unilateral transmandibular approach offers a large exposure of the lower clivus, the foramen magnum in its ventral part, the ipsilateral infratemporal fossa and C1 to C3. Surgical complications concern the lower cranial nerves, including the hypoglossal. Serous otitis media is possible in case of opened Eustachian tube. Tracheostomy is needed because of a transient tongue oedema. RESULTS: The unilateral transmandibular approach enabled to anatomical and physiological nasal preservation, large operative field facilitating dural closure and tumor removal, with acceptable cosmetic results and sequellae considering the natural course and prognosis of the tumor. CONCLUSIONS: This approach seems to be very useful to reach and removed extensive lower chordomas.

Crystal structures of protein phosphatase-1 bound to motuporin and dihydromicrocystin-LA: elucidation of the mechanism of enzyme inhibition by cyanobacterial toxins.

The microcystins and nodularins are tumour promoting hepatotoxins that are responsible for global adverse human health effects and wildlife fatalities in countries where drinking water supplies contain cyanobacteria. The toxins function by inhibiting broad specificity Ser/Thr protein phosphatases in the host cells, thereby disrupting signal transduction pathways. A previous crystal structure of a microcystin bound to the catalytic subunit of protein phosphatase-1 (PP-1c) showed distinct changes in the active site region when compared with protein phosphatase-1 structures bound to other toxins. We have elucidated the crystal structures of the cyanotoxins, motuporin (nodularin-V) and dihydromicrocystin-LA bound to human protein phosphatase-1c (gamma isoform). The atomic structures of these complexes reveal the structural basis for inhibition of protein phosphatases by these toxins. Comparisons of the structures of the cyanobacterial toxin:phosphatase complexes explain the biochemical mechanism by which microcystins but not nodularins permanently modify their protein phosphatase targets by covalent addition to an active site cysteine residue.