RESUME Introduction : Lʼostéome des sinus paranasaux est une tumeur bénigne rare, dʼévolution lente. Son traitement lorsquʼil sʼimpose, nʼest que chirurgical. Observations : Nous rapportons 38 cas dʼostéomes sinusiens dont le siège était frontal dans 27 cas, ethmoïdal dans 5 cas et ethmoïdo-frontal chez 6 patients. La tumeur était le plus souvent révélée par des céphalées associées ou non à une tuméfaction faciale. Nous avons réalisé une voie externe chez 36 patients et une voie endonasale sous guidage endoscopique dans deux cas. Lʼévolution a été favorable chez la plupart de nos patients. Deux récidives ont été diagnostiquées en moyenne 41 mois après lʼintervention. Conclusion : lʼostéome sinusien est une tumeur bénigne dont le traitement est chirurgical et sʼimpose dans les formes symptomatiques. La voie dʼabord dépend de la localisation tumorale. Le scanner permet de guider le choix de la voie dʼabord. Mots clés : ostéome, sinus, voie externe, voie endonasale. SUMMARY Introduction: Osteoma of the paranasal sinus is a rare and benign tumor that develops slowly when therapy becomes mandotory, it is necessarily surgical. Results: We report 38 cases of osteoma, operated by external approach in 36 cases and endonasal approach in 2 cases. The osteoma involved the frontal sinus in 27 cases, ethmoid in 5 cases and the junctional zone in 6 patients. The follow up patients was correctly done in 36 cases. The functional results were satisfying without recurrence in 34 of them (follow-up: 18 months). In the other 2 patients a recurrence was diagnosed. Conclusion: sinus osteoma is a benign tumor. Symptomatic form does been treated by a surgery. The approach depends on the location of osteoma and CT-Scan may guide the choice in pre operative period.
SUMMARYIntroduction : Superior semicircular canal dehiscence is a rare entity witch is recently described. The common symptom is pressure-induced vertigo. Patients and methods: we report 2 cases of superior semicircular canal dehiscence identified by computed tomography (CT) of the petrous bone in patients with mixed hearing loss and a normal tympanic membrane. Results: Superior semicircular canal dehiscence was bilateral in 1 patient. Mixed hearing loss with a normal tympanic membrane without vertigo was the presenting manifestation in all cases. Ultrahigh-resolution CT of the petrous bones with coronal and sagittal sections provided the diagnosis of superior semicircular canal dehiscence. Conclusion: Mixed hearing loss with a normal tympanic membrane should suggest superior semi circular canal dehiscence. Coronal and sagittal CT sections less than 1 mm in thickness establish the diagnosis.
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