A 13-year-old girl with a cystic cerebellar lesion: consider the hydatid cyst.

We report a 13-year-old girl with a hydatid cyst located in the posterior fossa. The pre-operative diagnosis was a cerebellar tumour; the cyst was operated on using puncture, aspiration, irrigation and resection. Sixteen months post-operatively, the patient is in a good health. A hydatid cyst must always be considered in the differential diagnosis of cystic lesions of the cranium, especially for those children living in rural areas.