Introduction: Optic nerve gliomas are rare tumors that are mainly observed in children. Exophthalmos and strabismus are the main signs of the disease. Neuroimaging and in particular magnetic resonance imaging is of great help in the diagnosis and follow-up of these tumors. The therapeutic management of these gliomas involves different means: surgical removal, chemotherapy, radiotherapy or abstention under surveillance. The indications must be discussed on a case-by-case basis. We report in this work a case of optic nerve glioma revealed by a strabismus and a unilateral exophthalmos. Case Report: This is a 3-year-old girl from a non-consanguineous marriage, with no specific pathological ATCD, who presented with divergent strabismus with left exophthalmos evolving for 3 months. The ophthalmologic examination noted a constant wide-angle divergent strabismus on the left eye with moderate exophthalmos on the same side. Corrected visual acuity was reduced to near finger count on the left and 5/10 on the right. Somatic examination found café au lait spots on the back and trunk. Cerebral CT showed a bilateral thickening of the optic nerves, fusiform and regular, more marked on the left, isodense to spontaneous contrast, homogeneously enhancing after injection of PDC. On the left, it is responsible for a downward refoulement of the eyeball with grade 1 exophthalmos. An MRI was ordered revealing a regular well-limited fusiform thickening of the optic nerves in T1 isosignal, intermediate in T2 and FLAIR, in diffusion hypersignal without ADC restriction, intensely and finely heterogeneous enhancing after injection of contrast medium. This thickening is responsible for a grade I left exophthalmos, with widening of the optic canals posteriorly and filling of the intraconical fat evoking a glioma appearance. The child was referred to neurosurgery for management. Conclusion: The diagnosis of optic nerve glioma in children is rare, with atypical presentations both in terms .........

Introduction: Aneurysmal bone cyst (ABC) is a primary or secondary benign tumor, consisting of an intraosseous cavity, uni or multilocular, with hematic content. It can develop on all bones of the skeleton with, however, a predilection for the long bones and the spine. KOA mainly affects children and young adults, with a slight female predominance. Objective: The aim of this work is to reveal the diagnostic features at the imaging level. Case Report: This is an 11-year-old female patient with no previous pathological history who has presented for 1 year with diffuse maxillofacial pain, with intermittent fluid discharge in the oral cavity. Facial CT scan without and with contrast injection objective a lytic image centered on the lateral wall of the left maxillary sinus bulging into the sinus lumen with a spontaneously hypodense multicompartmental appearance without contrast gain after PDC injection. Conclusion: KAO is a very polymorphic lesion, which presents a diagnostic problem (Aspecific radiological appearance). In spite of the different therapeutic modalities proposed, it is the surgical treatment which exposes less risk of recurrence.