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Resume Introduction Le kyste hydatique est une anthropozoonose due au developpement chez l’homme de la forme larvaire du taenia Echinococcus granulosius . Il est endemique au Maroc. La localisation a la fosse infratemporale est extremement rare. Nous en rapportons un cas pediatrique. Observation Un enfant de 11 ans nous a ete adresse pour tumefaction laterofaciale evoluant depuis 2 mois et augmentant progressivement de volume. L’examen tomodensitometrique a montre une formation kystique de 7 cm de diametre a la fosse infratemporale gauche. La serologie hydatique etait negative. Le kyste a ete reseque par voie transzygomatique. Le diagnostic de kyste hydatique a ete confirme par l’histologie. Discussion Les kystes hydatiques dans la fosse infratemporale sont tres rares chez l’enfant. Leur developpement est rapide (1 a 5 cm par an). Leur expression clinique depend de l’extension aux structures anatomiques adjacentes. La serologie hydatique est souvent negative. La tomodensitometrie est l’examen radiologique de reference. La resection chirurgicale est le traitement de choix. Dans notre cas, la voie d’abord transzygomatique a permis d’exposer completement le kyste contribuant a la qualite exerese.

Hydatid cyst or disease is an anthropozoonosis due to the development of the larval form of the taenia Echinococcus granulosus in humans. It is endemic in Morocco. The location of a hydatid cyst in the infratemporal fossa (ITF) is extremely rare. The authors report a pediatric case.An 11 year old child was admitted to hospital with a history of left latero-facial swelling gradually increasing in volume for 2 months, CT scan of the face revealed a cystic formation of 7 cm diameter sitting at the left ITF, hydatid serology was negative. A transzygomatic approach allowed the excision of the cyst. The histopathological examination of the resected specimen confirmed the diagnosis of hydatid cyst.The location at the infratemporal fossa of an expansive process such as hydatid cyst in children may have a particular impact on adjacent structures and a more meaningful clinical expression. The rate of growth of hydatid cysts is highly variable and ranges from 1 to 5 cm a year. Hydatid serology is often negative. CT examination is the gold-standard radiological examination. Surgical removal of the hydatid cyst is the most effective treatment. The transzygomatic approach allowed a sufficient access to the cyst and a good quality of excision.

Cementoblastoma is a rare benign odontogenic neoplasm. Its cause is unknown. It represents less 6 % of all odontogenic tumors. The aim of our work is to present a rare case of maxillary cementoblastoma involving an included central incisor. A 32-year old man consulted for a left maxillary swelling to projection under nostril. A panoramic radiographic examination revealed an included tooth 21 with a radiopaque lesion around its root. The computed tomography revealed the included tooth 21 with a process around its root. This process is well-defined, high-dense and is surrounded by a radiolucent halo. The treatment should consist of complete removal of the lesion with the tooth 21. Histological examination concluded to the diagnosis of a cementoblastoma. The cementoblastoma occurs most frequently in young persons and predominantly among men. The mandibular premolar and molar are the more frequently reached. The maxillary localization remains rare. This tumor occurs around the roots of the posterior and lower teeth. Radiographically, the lesion is well-defined and attached to the root of the tooth, radiopaque dense and surrounded by a radiolucent halo. The cementoblastoma evolves slowly and has the tendency to blow the cortical. The prognosis is good.