Intra-orbital hydatid cyst is a very rare pathological entity that affects children and the young adults; it is secondary to the development in the orbit of the echinococcus granulosis tapeworm. Its frequency does not exceed 1% of all cases of hydatid disease. Clinical presentation of intra-orbital hydatid cyst is dominated by proptosis and a decrease in visual acuity, complete surgical excision is difficult, evolution is generally better when the treatment is early before the installation of irreversible optic atrophy. We report one case of a 3 years old girl operated for right intra-orbital hydatid cyst who presented with proptosis and blindness. Complete removal was difficult and puncture of the cyst was performed followed by excision of its membrane with good post-operative results. We also discuss the different epidemiological, clinical, radiological and therapeutic aspects of intra-orbital hydatid cyst and a review of literature of this rare pathology.

Le sarcome dEwing est une tumeur maligne touchant essentiellement le sujet jeune de moins de 20 ans, il represente la tumeur osseuse maligne la plus frequente apres losteosarcome chez le sujet jeune. Latteinte de la voute cranienne est rare, elle constitue 1% de toutes les localisations. Nous rapportons une observation afin de montrer la rarete et de mettre en evidence les particularites cliniques, therapeutiques et evolutives de cette affection.

Description Los odontoideum ou apophyse odontoide mobile est une malformation rare de la charniere cervicooccipitale interessant la deuxieme vertebre cervicale Methode: Nous rapportons le cas dune patiente qui presente une malformation de la charniere cervico-occipitale diagnostiquee et traitee au service de neurochirurgie ibn tofail du CHU Mohamed VI de Marrakech Resultats: Il sagissait dune patiente de 45 ans, chez qui on a diagnostique un os odentoideum. Apres bilan radiologique complet, la patiente a ete traitee chirurgicalement.Nous avions privilegie la voie dabord posterieure avec fixation C1C2. Conclusion: Lindication chirurgicale de los odontoideum est basee sur la symptomatologie clinique, la technique, quant a elle, depend de la reductibilite par les manœuvres de traction et dextension.

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