Leiomyome agressif naso-sinusien : a propos d’un cas et revue de la litterature

Introduction : Les léiomyomes sont des tumeurs bénignes issues des fibres musculaires lisses. La localisation au niveau des cavités nasosinusiennes est très rare.Cas clinique : Il s’agit d’une patiente âgée de 59 ans, qui a consulté pour obstruction nasale et épistaxis gauches. L’endoscopie nasale a montré une formation comblant totalement la fosse nasale gauche. L’imagerie (TDM, IRM) a objectivé un volumineux processus expansif tissulaire naso-ethmoïdo-maxillaire, avec extension intra-orbitaire et endocrânienne. La biopsie confirmé qu’il s’agit d’un léiomyome à localisation nasosinusienne. La patiente a été opérée par voie paralatéronasale élargie. Elle a eu une exérèse tumorale complète et une reconstruction de la perte de substance osseuse par autogreffe. Les suites opératoires étaient simples. Aucune récidive n’a été notée après un recul de 1 an.Conclusion : La localisation nasosinusienne du léiomyome est très rare. L’imagerie est indispensable dans le cadre du bilan d’extension loco-régional. Seul une exérèse chirurgicale complète permettra d’éviter toute récidive aussi bien à court qu’à long terme.Mots-clés : léiomyome, fosses nasales, sinus, tomodensitométrie, imagerie par résonance magnétique, chirurgie sinusienneIntroduction: Leiomyomas are benign tumors arising from smooth muscle fibers. The location at the sinonasal cavities is very rare.Case report: This is a female patient aged 59, who consulted for left nasal obstruction and epistaxis. Nasal endoscopy showed a tumor completely filling the left nasal cavity. Imaging (CT, MRI) has objectified a large expansive tissularnaso-maxillary-ethmoidal process with intraorbital and intracranial extension. The biopsy confirmed that this was a leiomyoma with sinonasal localization. The patient was operated by extended paralatéronasale approach. She had a complete tumor resection and reconstruction of the bone defect with autograft. The postoperative course was uneventful. No recurrence was observed after a follow-up period of 1 year.Conclusion: The sinonasal location of leiomyoma is very rare. Imaging is essential for locoregional staging. Only a complete surgical resection will prevent any recurrence both in short and long term.Keywords : leiomyoma, nasal fossae, sinus, computed tomography, magnetic resonance imaging, sinusal surger

Removal of cationic pollutants from water by xanthated corn cob: optimization, kinetics, thermodynamics, and prediction of purification process

The removal of Cr(III) ions and methylene blue (MB) from aqueous solutions by xanthated corn cob (xCC) in batch conditions was investigated. The sorption capacity of xCC strongly depended of the pH, and increase when the pH rises. The kinetics was well fitted by pseudo-second order and Chrastil’s model. Sorption of Cr(III) ions and MB on xCC was rapid during the first 20 min of contact time and, thereafter, the biosorption rate decrease gradually until reaching equilibrium. The maximum sorption capacity of 17.13 and 83.89 mg g-1 for Cr(III) ions and MB, respectively was obtained at 40 °C, pH 5 and sorbent dose 4 g dm-3 for removal of Cr(III) ions and 1 g dm-3 for removal of MB. The prediction of purification process was successfully carried out and the verification of theoretically calculated amounts of sorbent was confirmed by using packed-bed column laboratory system with recirculation of the aqueous phase. The wastewater from chrome plating industry was successfully purified, i.e. after 40 min concentration of Cr(III) ions was decreased lower than 0.1 mg dm-3. Also, removal of MB from the river water was successfully carried out and after 40 min removal efficiency was about 94 %