Intracranial dermoid cysts are congenital benign neoplasms mostly diagnosed in the pediatric hood and usually involve the midline structures. They count approximately less than 1% of all intracranial neoplasms and are believed to arise from ectopic cell rests incorporated in the closing neural tube. These dermoid cysts, especially those involving the posterior fossa and overlying the torcular, are uncommon. We report perhaps the first case of this entity in a third-year-old boy and discuss the physiopathogenesis, the imaging features and the best technical note to manage this cyst in this location.
Intracranial tuberculomas are one of the most serious formsof tuberculosis disease after meningitis tuberculosis. It incidence varies around 0.15% -0.18% in the development world to 5% -30% of intracranial masses in some under developments areas. These tuberculomas, of course ubiquitous, are mostly diagnosed in the adulthood and usually located in the cerebellum and the cerebral hemispheres. Intra ventricular involving is uncommon and just 10 cases had been described in the literature. We report a case of an intraventricular tuberculoma in a 26-year-old man and we discuss the pathogenesis and the radiological findings according this location.
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