An Echinococcosis multilocularis presenting as a giant anterior cranial basilar tumor.

Cerebral alveolar hydatid disease is a rare subtype of Echinococcus, and prevalent in northern China and Tibetan area. In this report, we presented a giant lesion of Echinococcus multilocularis which located in anterior cranial fossa, and discussed its clinicopathological and radiological features, and strategy of treatment.